Call of Black Crows

Target Creature must attack this turn if able.
Rainbow(As long as one mono-color permanent of
each color is in play, the game has rainbow)
Target creature you control gains Deathtouch
and Lifelink until end of turn.
"The victim perceives sounds and smells that draw
them close. Calls from game or help from companions.
Smells of prey or food. All change to a loud caw and
reek of rot become clear only at the last moment.