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Azorius Guildgate enters the battlefield tapped. {T}: Add {W} or {U}.

Trample Volatile Rig attacks each combat if able. Whenever Volatile Rig is dealt damage, flip a coin. If you lose the flip, sacrifice Volatile Rig....

As Tablet of the Guilds enters the battlefield, choose two colors. Whenever you cast a spell, if it's at least one of the chosen colors, you gain 1...

Whenever Street Sweeper attacks, destroy all Auras attached to target land.

{T}: Add {G} or {W}. {G}{W}: Selesnya Keyrune becomes a 3/3 green and white Wolf artifact creature until end of turn.

{T}: Add {B} or {R}. {B}{R}: Rakdos Keyrune becomes a 3/1 black and red Devil artifact creature with first strike until end of turn.

{T}: Add {U} or {R}. {U}{R}: Until end of turn, Izzet Keyrune becomes a 2/1 blue and red Elemental artifact creature. Whenever Izzet Keyrune deals ...

Enchant nonland permanent At the beginning of the upkeep of enchanted permanent's controller, that player sacrifices it unless they pay {X}, where ...

{T}: Target player puts the top card of their library into their graveyard. {5}, {T}, Sacrifice Codex Shredder: Return target card from your gravey...

Equipped creature gets +1/+0 for each of its colors. Equip {1}

Flying

Destroy target artifact or enchantment, then populate. (Create a token that's a copy of a creature token you control.)

Scavenge {0} ({0}, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only...

Haste

Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)

When Seller of Songbirds enters the battlefield, create a 1/1 white Bird creature token with flying.

Exile an instant or sorcery spell you control: Put two +1/+1 counters on Nivmagus Elemental. (That spell won't resolve.)

At the beginning of your upkeep, populate. (Create a token that's a copy of a creature token you control.)

{U/R}: Frostburn Weird gets +1/-1 until end of turn.

If an instant or sorcery card would be put into a graveyard from anywhere, exile it instead.

Trample Cryptborn Horror enters the battlefield with X +1/+1 counters on it, where X is the total life lost by your opponents this turn.

Whenever you cast an instant or sorcery spell, Blistercoil Weird gets +1/+1 until end of turn. Untap it.

{5}{G}: Regenerate Selesnya Sentry.