Deadly Rollick

If you control a commander, you may cast this spell without paying its mana cost.
Exile target creature.

Aragorn, the Uniter

Whenever you cast a white spell, create a 1/1 white Human Soldier creature token.
Whenever you cast a blue spell, scry 2.
Whenever you cast a red spell, Aragorn, the Uniter deals 3 damage to target opponent.
Whenever you cast a green spell, target creature gets +4/+4 until end of turn.

Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.