Whenever Dragonspark Reactor or another artifact enters the battlefield under your control, put a charge counter on Dragonspark Reactor. {4}, Sacrifice Dragonspark Reactor: It deals damage equal to the number of charge counters on it to target player and that much damage to up to one target creature.

False Floor enters the battlefield tapped. Creatures enter the battlefield tapped. {2}, {T}, Exile False Floor: Exile all untapped creatures. Activate only as a sorcery.

Equipped creature gets +1/+0 and has trample. Equip {1}{R} When Goblin Morningstar enters the battlefield, roll a d20. 1—9 | Create a 1/1 red Goblin creature token. 10—20 | Create a 1/1 red Goblin creature token, then attach Goblin Morningstar to it.

If equipped creature would deal combat damage, it deals double that damage instead. If another creature would deal combat damage to equipped creature, it deals double that damage to equipped creature instead. Equip {2}

{T}, Sacrifice Mimic: Add one mana of any color. {2}: Mimic becomes a Shapeshifter artifact creature with base power and toughness 3/3 until end of turn.

Equipped creature has "{1}, {T}, Sacrifice Ninja's Kunai: Ninja's Kunai deals 3 damage to any target." Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

{2}: Stuffed Bear becomes a 4/4 green Bear artifact creature until end of turn.

{3}, {T}: Target player chooses a card name, then reveals the top card of their library. If that card has the chosen name, that player puts it into their hand. Otherwise, they put it into their graveyard and Vexing Arcanix deals 2 damage to them.

Whenever Acquisition Octopus or equipped creature deals combat damage to a player, draw a card. Reconfigure {2} ({2}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Flying Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.) When Bloodwater Entity enters the battlefield, you may put target instant or sorcery card from your graveyard on top of your library.

When Goblin Gardener dies, destroy target land.

Defender, flying, first strike Cumulative upkeep {U} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

{G/P}: Insatiable Souleater gains trample until end of turn. ({G/P} can be paid with either {G} or 2 life.)

Juggernaut attacks each combat if able. Juggernaut can't be blocked by Walls.

Whenever Momentum Rumbler attacks, if it doesn't have first strike, put a first strike counter on it. Whenever Momentum Rumbler attacks, if it has first strike, it gains double strike until end of turn.

Flying Whenever Moonfolk Puzzlemaker becomes tapped, scry 1.

When Sparring Construct dies, put a +1/+1 counter on target creature you control.

Whenever you cast a noncreature spell, put a +1/+1 counter on Spellgorger Weird.

Flying, haste Whenever you cast a noncreature spell, put a +1/+1 counter on Sprite Dragon.

Enrage — Whenever Sun-Crowned Hunters is dealt damage, it deals 3 damage to target opponent or planeswalker.

As long as you control eight or more lands, Vortex Runner gets +1/+0 and can't be blocked.

At the beginning of combat on your turn, target creature you control gains double strike until end of turn.

{2}: Goblin Festival deals 1 damage to any target. Flip a coin. If you lose the flip, choose one of your opponents. That player gains control of Goblin Festival.

Creatures without flying don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped creatures without flying they control and pay {2} for each creature chosen this way. If the player does, untap those creatures.

Whenever a creature enters the battlefield, that creature's controller may have it deal damage equal to its power to any target of their choice.

Whenever a creature you control attacks, it phases out at end of combat. (While it's phased out, it's treated as though it doesn't exist. It phases in before you untap during your next untap step.)

Counter target noncreature spell unless its controller pays {1} plus an additional {1} for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

({T}: Add {U}.)

Izzet Guildgate enters the battlefield tapped. {T}: Add {U} or {R}.

({T}: Add {R}.)

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.