Serpent of Soroborou

Trample, haste
Bloodrush — {6}{r}{g}, Discard Serpent of Soroborou: Target attacking creature gets +9/+9 and gains trample and haste until end of turn. Then, for each {u} spent to activate this ability, target player returns a nonland permanent they control to its owner's hand, and for each {b} spent to activate it, target player discards a card.