Savage aria

: This creature gets +X/+0 until end of turn, where X is its power.

Enchant creature Enchanted creature gets +1/+1 for each Forest you control.

Enchant creature Enchanted creature gets +1/+1 for each Plains you control and has flying.

At the beginning of your upkeep, put a +1/+1 counter on each creature you control if you control a creature with power 5 or greater. Then you gain 10 life if you control a creature with power 10 or greater. Then you win the game if you control a creature with power 20 or greater.

Enchant creature Enchanted creature gets +1/+0 for each Mountain you control and has first strike.