Gizamaluke's Grotto

Gizamaluke's Grotto enters the battlefield tapped unless you pay 2 life or control an enchantment.
{t}: Add {w} or {u} to your mana pool.
{w}, {t}: Exile two target creatures you control.
Return them to the battlefield under their owners
control at the beginning of the next upkeep. They
each get lifelink and +1/+1 as long as you control
both creatures.