Mercenary / Elemental
While you have a Fire spell in your discard pile, Magma Elemental gains +3 ATK.
While you have an Earth spell in your discard pile, Magma Elemental gains +3 AC.
While you have 5 or more Fire and/or Earth spells in your discard pile, Magma Elemental has an additional melee strike (base +0 ATK) when he attacks and gains +1 HP.