Interplanar Emmisary

Physicality {3} (As you cast this spell, you may pay an additional {3}. If you do, it becomes an Aura Enchantment with Enchant Player)
Until end of turn, creatures you control have Indestructible and can't get -1/-1 counters.
At the beginning of enchanted player's upkeep, that player puts a 2/2 white Spirit Warrior creature token onto the battlefield with "This creature can't get -1/-1 counters."