Livekill Sliceweaver

Reach, webweaver (Whenever a creature an
opponent controls attacks a player who controls a
creature with webweaver, that creature also does its
power to the creature with webweaver. If the creature
with webweaver doesn't die from this combat damage,
the creature that attacked you this turn can't
attack next turn.)
Whenever Livekill Sliceweaver blocks a creature,
it does its combat damage to that creature equal
to its toughness instead of its power.