Ro, Peacekeeper of the Guild

Ro, Peacekeeper of the Guild enters the
battlefield with a number of peace counters on it
equal to the amount of mana spent to cast it.
Remove a peace counter from Ro: Choose one —
• Target creature's power becomes equal to it's toughness until the start of your next turn.
• Prevent all damage that would be dealt this turn.
• Target creature is indestructible until the end
of turn.