Lucas, to Knock for Six

Skulk (This creature can't be blocked by creatures
with greater power)
Whenever Lucas deals combat damage to a player
you gain 1 life and draw a card if this is the first
time this ability has resolved this turn. If it's
the second time, until end of turn you may look
at and play the top card of your library. If it's
the third time, take an extra turn after this one,
at the beginning of that turn this creature phases
out.