Whenever you cast a spell, you gain 1 life for each spell you've cast this turn. Pay 50 life: This artifact deals 50 damage to any target.

You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.

{6}, {T}: Two target players exchange life totals.

{T}, Sacrifice this artifact: You gain life equal to the total life lost by all players this turn. (Damage causes loss of life.)

You have no maximum hand size. {T}: Add {C}.

Sacrifice this creature: You gain life equal to the life you've lost this turn. (Damage causes loss of life.)

Flying, trample Pay 2 life: Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

You may exert this creature as it attacks. When you do, it gets +1/+3 and gains lifelink until end of turn. (An exerted creature won't untap during your next untap step.)

Menace Greven gets +X/+0, where X is the amount of life you've lost this turn. Whenever Greven attacks, you may sacrifice another creature. If you do, you draw cards equal to that creature's power and you lose life equal to that creature's toughness.

This creature enters with three credit counters on it. When this creature enters, it deals 3 damage to you. At the beginning of your upkeep, put a credit counter on this creature. Sacrifice this creature: You gain 1 life for each credit counter on this creature. Activate only during your upkeep.

{T}, Sacrifice this creature: Exchange life totals with target opponent. Activate only during your upkeep.

({R/P} can be paid with either {R} or 2 life.) Flying {R/P}: This creature gets +1/+0 until end of turn.

Flying, lifelink At the beginning of your upkeep, sacrifice Piru unless you pay {R}{W}{B}. When Piru dies, it deals 7 damage to each nonlegendary creature.

When this creature enters, you may sacrifice another creature you control. If you do, create a number of Treasure tokens equal to that creature's power. {2}{B}, Sacrifice X artifacts: Return target creature card with power X or less from your graveyard to the battlefield. X can't be 0.

{T}, Pay 3 life: Flip a coin. If you win the flip, you gain 6 life.

This creature has echo {X}, where X is your life total. (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, it deals an amount of damage of your choice to you and target creature. The damage can't be prevented.

{B}, Pay 2 life: Draw a card.

Skip your draw step. At the beginning of your end step, you may pay any amount of life. If you do, draw that many cards. Your maximum hand size is five. If a card or token would be put into your graveyard from anywhere, exile it instead.

If an opponent would gain life, that player loses that much life instead.

Target creature you control deals damage equal to its power to each other creature and each opponent.

This spell costs 3 life more to cast for each target. Destroy any number of target creatures.

Put target creature card from a graveyard onto the battlefield under your control. You lose life equal to its mana value.

Each player's life total becomes the lowest life total among all players.

Redistribute any number of players' life totals. (Each of those players gets one life total back.)

This artifact enters with X charge counters on it, where X is your life total. Landfall — Whenever a land you control enters, you may have your life total become the number of charge counters on this artifact.

Lifelink (Damage dealt by this creature also causes you to gain that much life.) As long as you have 30 or more life, this creature gets +5/+5 and has flying.