Magma Experiment

Haste
Loot (Whenever this creature deals damage to
an opponent, add one mana of any colour to
your mana pool. If this mana empties from your mana pool, put a +1/+1 counter on this
creature.)
{1}{r}, remove a +1/+1 counter from Magma
Experiment: It deals 1 damage to any
target.