Activated abilities of creatures you control cost {X} less to activate, where X is Agatha of the Vile Cauldron's power. This effect can't reduce the mana in that cost to less than one mana. {4}{R}{G}: Other creatures you control get +1/+1 and gain trample and haste until end of turn.

As long as you control another multicolored permanent, Bant Sureblade gets +1/+1 and has first strike.

Activated abilities of creatures you control cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana. {T}: The next time target creature adapts this turn, it adapts as though it had no +1/+1 counters on it.

{T}: For each color among permanents you control, add one mana of that color.

As long as you control another multicolored permanent, Esper Stormblade gets +1/+1 and has flying.

As long as you control another multicolored permanent, Grixis Grimblade gets +1/+1 and has deathtouch. (Any amount of damage it deals to a creature is enough to destroy that creature.)

Whenever you cast a multicolored spell, create a 1/1 white Human creature token.

As long as you control another multicolored permanent, Jund Hackblade gets +1/+1 and has haste.

Whenever a player casts their second spell each turn, you lose 1 life and create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

For each color, return up to one target card of that color from your graveyard to your hand. Exile All Suns' Dawn.

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Return target multicolored card from your graveyard to your hand.