Andros, Oracle of Disaster

Haste
Trample
Whenever one or more nontoken creatures you
control deal combat damage to a player you may
pay 2 life. When you do, sacrifice one of those
creatures, then search your library for a creature
card with the same mana value plus 1, and put
it onto the battlefield. Then, if a creature
entering the battlefield this way triggers an
ability from the entering creature, that ability
triggers an additional time.