All permanents on the battlefield. At least one Forest on the battlefield under your control. Pemmin's Aura attached to Arbor Elf. Grafted Growth attached to a Forest you control.
Freed from the Real + Arbor Elf + Grafted Growth
Combo result
Infinite green mana. Infinite white mana. Prerequisites
All permanents on the battlefield. At least one Forest on the battlefield under your control. ~1 attached to Arbor Elf. ~2 attached to a Forest you control.