Flaming Sphere

{x}{r}: Flaming Sphere deals X damage to target creature or player where X is the mana cost to activate this ability, activate only once per turn.
During your Combat Step, Flaming Sphere becomes an enchantment creature whose power and toughness equal the number of instants and sorceries in your graveyard, up to a maximum of 4; if you control a Geleran, Druid of the Moon or Geleran, Enemy of the Abyss, Flaming Sphere has a power and toughness of 5/5 instead.
(Only one Flaming Sphere can be on the bat