Yuuma, Undefeatable Great Evil

Indestructible, Vigilance.
Whenever Yuuma is targeted by a spell, you may pay {2}. If you do, Yuuma gains the below one for every unique color in the Mana Value of the spell. (This effect stacks for every time Yuuma has been targeted)
• {w} Attack, Create a 3/1 white flying eagle token, it is tapped and attacking.
• {u} Attack, Tap target creature
• {b} Attack, Target player discards one
{bull} {r} Attack, Yuuma deals 1 damage to target player.
{bull} {g} Attack, Add one mana of any c