{T}: Add {R}{R}. At the beginning of each player's upkeep, that player may put a doom counter on this artifact or remove a doom counter from it. Then if it has three or more doom counters on it, sacrifice this artifact. When you do, it deals 6 damage to each creature.

At the beginning of your upkeep, flip a coin. If you lose the flip, this artifact deals 3 damage to you. {T}: Add {C}{C}.

All damage that would be dealt to you is dealt to equipped creature instead. Equip {3}

{T}: Add {C}{C}.

Indestructible Whenever this creature is dealt damage, it deals that much damage to target opponent. {2}{R}, {T}: This creature fights another target creature.

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.) Whenever Donna Noble or a creature it's paired with is dealt damage, Donna Noble deals that much damage to target opponent. Doctor's companion (You can have two commanders if the other is the Doctor.)

Equipped creature gets +2/+0 and has reach. Whenever equipped creature is dealt damage, it deals damage equal to its power to target player or planeswalker. Equip {2}{R}

Enrage — Whenever this creature is dealt damage, it deals 2 damage to target opponent or planeswalker.

Whenever this creature is dealt damage, it deals that much damage to target opponent or planeswalker.

Sliver creatures you control have "Whenever this creature is dealt damage, it deals that much damage to target player or planeswalker."

Whenever this creature is dealt damage, it deals that much damage to any target.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.) Whenever this creature is dealt damage, it deals that much damage to target player.

Flying Whenever this creature becomes the target of a spell or ability, this creature gets +0/+3 until end of turn.

Whenever a Cleric creature you control becomes the target of a spell or ability, it gets +0/+2 until end of turn.

Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.

Defender, flying Whenever this creature is dealt damage, you and target opponent each draw a card.

Flying, first strike If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead. If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up.

Trample {0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

{0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

{0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead. {1}{W}: The next time a source of your choice would deal damage to target creature this turn, that damage is dealt to this creature instead.

Flying {0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

Indestructible As this creature enters, choose a player. Whenever this creature is dealt damage, it deals that much damage to the chosen player. {T}: This creature deals 1 damage to itself.

Whenever this creature becomes the target of a spell or ability, it gets +0/+3 until end of turn.

Enchant land Enchanted land has "{T}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness."

Enchant creature Enchanted creature can block any number of creatures.

At the beginning of combat on your turn, target creature you control gains indestructible until end of turn. {1}{R}: This enchantment deals 1 damage to target blocking creature.

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

Copy target instant or sorcery spell. You may choose new targets for the copy.

{T}: Add {C}. {T}: Add {R} or {W}. This land deals 1 damage to you.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {R}{W}.

This land enters tapped unless you control a Mountain or a Plains. {T}: Add {R} or {W}.

{T}: Add one mana of any color in your commander's color identity.

{T}: Add {W}. {W}, {T}: Prevent the next 2 damage that would be dealt to target legendary creature this turn.

{T}: Add {W}. Channel — {2}{W}, Discard this card: It deals 4 damage to target attacking or blocking creature. This ability costs {1} less to activate for each legendary creature you control.

{T}: Add {W}. When Flagstones of Trokair is put into a graveyard from the battlefield, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

As this land enters, you may reveal a Mountain or Plains card from your hand. If you don't, this land enters tapped. {T}: Add {R} or {W}.

This land enters tapped unless you control two or fewer other lands. {T}: Add {R} or {W}.

{T}: Add {C}. {3}, {T}, Sacrifice a creature: You gain life equal to the sacrificed creature's toughness.

({T}: Add {R}.)

This land enters tapped. {T}: Add {C}. {2}, {T}, Sacrifice this land: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

{T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

({T}: Add {W}.)

({T}: Add {R} or {W}.)

{T}: Add {C}. {R/W}, {T}: Add {R}{R}, {R}{W}, or {W}{W}.

This land enters tapped. Indestructible {T}: Add {R} or {W}.

({T}: Add {R} or {W}.) As this land enters, you may pay 2 life. If you don't, it enters tapped.

{T}: Add {C}. {R}{W}, {T}: Target creature gets +2/+0 and gains vigilance and haste until end of turn.

This land enters tapped unless you have two or more opponents. {T}: Add {R} or {W}.

This land enters tapped unless you control two or more other lands. {T}: Add {R} or {W}.

{T}: Add {C}. {2}{R}{W}, {T}: Target creature gains double strike until end of turn.

Put two +1/+1 counters on target creature. It gains vigilance, trample, lifelink, indestructible, and haste until end of turn. Flashback {2}{R}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Flying, vigilance, indestructible Other permanents you control have indestructible.

Choose one — • Boros Charm deals 4 damage to target player or planeswalker. • Permanents you control gain indestructible until end of turn. • Target creature gains double strike until end of turn.

Indestructible Equipped creature has indestructible. Equip {2}

{3}: The next time a source of your choice would deal damage to you this turn, that damage is dealt to target creature you control instead.

Choose a creature or planeswalker you control. All damage that would be dealt this turn to you and permanents you control is dealt to the chosen permanent instead (if it's still on the battlefield).

Whenever Hammer of Nazahn or another Equipment you control enters, you may attach that Equipment to target creature you control. Equipped creature gets +2/+0 and has indestructible. Equip {4}

Enchant permanent Enchanted permanent has indestructible. (Effects that say "destroy" don't destroy that permanent. A creature with indestructible can't be destroyed by damage.)

Until end of turn, target creature you control gains "{0}: The next 1 damage that would be dealt to target creature, planeswalker, or player this turn is dealt to this creature instead." Only you may activate this ability.

Flying, vigilance You have hexproof. Whenever this creature is dealt damage, you gain that much life.

Flash Indestructible When Mithril Coat enters, attach it to target legendary creature you control. Equipped creature has indestructible. Equip {3}

Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.) {0}: The next 1 damage that would be dealt to this creature this turn is dealt to target creature you control instead.

Enchant creature Enchanted creature has indestructible. Whenever a creature enters, you may attach this Aura to that creature.

Anger of the Gods deals 3 damage to each creature. If a creature dealt damage this way would die this turn, exile it instead.

Choose target creature. Whenever that creature is dealt damage this turn, it deals that much damage to each other creature and each player.

This spell costs {1} less to cast for each creature on the battlefield. Blasphemous Act deals 13 damage to each creature.

Equipped creature gets +1/+0 for each opponent you have. Whenever equipped creature is dealt damage, it deals that much damage to any target. Equip {4}

Whenever this creature is dealt damage, it deals that much damage to any target. {R/W}: This creature gains first strike until end of turn.

Chain Reaction deals X damage to each creature, where X is the number of creatures on the battlefield.

Choose one or both — • Deafening Clarion deals 3 damage to each creature. • Creatures you control gain lifelink until end of turn.

Earthquake deals X damage to each creature without flying and each player.

Enchant creature Whenever enchanted creature deals damage, this Aura deals that much damage to that creature.

Flying If damage would be dealt to this creature, prevent that damage. When damage is prevented this way, this creature deals that much damage to any other target.

Rolling Earthquake deals X damage to each creature without horsemanship and each player.

Sweltering Suns deals 3 damage to each creature. Cycling {3} ({3}, Discard this card: Draw a card.)

As an additional cost to cast this spell, discard X cards. Nahiri's Wrath deals damage equal to the total mana value of the discarded cards to each of up to X target creatures and/or planeswalkers.

Split second (As long as this spell is on the stack, players can't cast spells or activate abilities that aren't mana abilities.) You can't lose the game this turn and your opponents can't win the game this turn. Until end of turn, damage that would reduce your life total to less than 1 reduces it to 1 instead.

{T}: Add one mana of any color in your commander's color identity.

{3}, {T}: Tap target creature you control and target creature of an opponent's choice they control. Those creatures fight each other. (Each deals damage equal to its power to the other.)

{X}, {T}: Choose one — • Prevent the next X damage that would be dealt to target creature this turn. Spend only white mana on X. • You gain X life. Spend only white mana on X.

Flying Whenever a source you control deals damage to you, put that many +1/+1 counters on Auntie Blyte. {1}{R}, {T}, Remove X +1/+1 counters from Auntie Blyte: It deals X damage to any target.

Flying Players can't cast spells during combat. {R}: Target creature attacks this turn if able.

{T}: Prevent the next X damage that would be dealt to target creature this turn, where X is the number of Clerics on the battlefield.

If a source would deal damage to a player, you may prevent X of that damage, where X is the number of Clerics you control.

This land enters tapped. {T}: Add {R} or {W}.

{1}, {T}: Add {R}{W}.

Creatures you control get +1/+1 until end of turn. Fateful hour — If you have 5 or less life, those creatures gain indestructible until end of turn. (Damage and effects that say "destroy" don't destroy them.)

Whenever a creature you control enters, you gain 1 life. To solve — You've gained 5 or more life this turn. (If unsolved, solve at the beginning of your end step.) Solved — Sacrifice this Case: Creature cards in your graveyard gain "You may cast this card from your graveyard" until end of turn.