Lifecrafter's Cradle

{t}: Add {c} to your mana pool.
{t}: Add one mana of any color to your mana pool if you control three or more creatures. Spend this mana only to cast creature spells.
{x}: Create a 0/0 colorless Lifeform. It enters the battlefield with X +1/+1 counters.
{5}{t}: Put a creature card from your hand onto the battlefield.