Decadent Host

Deathtouch
When Decadent Host enters the battlefield, you
may have target creature gets -3/-3 until end of
turn. If you do, another target creature gets
+3/+3 until end of turn.
Stalk {1}{b} (At the end of each block step, if there is
an unblocked creature attacking you, you may cast
this card for its stalk cost. If you do, choose an
unblocked creature attacking you. This creature blocks that creature.)