Glen Elendra's Answer

(T: Add W.)

(T: Add U.)

(T: Add B.)

Other tapped creatures you control have indestructible.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for 1 or one mana of that creature's color.) One or two target creatures each get +2/+1 until end of turn.

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

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

Changeling (This card is every creature type.) When this creature dies, exile the top card of your library. Until the end of your next turn, you may play that card.