Aolis: Heir to the Green

+2: Create a 0/4 Plant Wall Creature Token with "Tap, Add One Green Mana To Your Mana Pool"
-6: Distribute 5 +1/+1 counters among creatures you control, then Proliferate
-12: All Creatures you control get +2/+2 gain trample, and all lands you control now add an additional mana to your mana pool