Rocket pass

At the end of your turn you may pay {x}, you get that many tiers.
If you have 5 tiers all creatures you control gain +1/+1 untill end of turn
If you have 10 tiers all creatures you control gain +1/+1.
If you have 20 tiers creatures you control that have a +1/+1 counter on it gains +5/+5 and trample untill end of turn, all creatures have indestructible untill end of turn