Araava, Guide to the Great

Partner with Melrav, Shredder of the Weak.
Vigilance, reach
You can't cast noncreature spells.
Creature spells you cast with power 4 or greater cost {2} less to cast and can't be countered.
{t}: Add {r}{g}. Spend this mana only to cast creature spells with power 4 or greater.