Inferior Volcano

Kicker (3)(R)(G) or (R)(G) If you paid the (3)(R)(G) kicker cost, Inferior Volcano is a 0/5 creature with vigilance instead of a land and has "When Inferior Volcano attacks, if you pay (1)(R)(G), it has +6/+0 until the end of the turn."
If you paid the (R)(G) kicker cost, Inferior Volcano is a land and has "(T): Add (R)(G) to your mana pool."