Ginger, the Meal Ender

Syr Ginger, the Meal Ender has trample,
hexproof, and haste as long as an
opponent controls a planeswalker.
Whenever another artifact you control
is put into a graveyard from the battlefield,
put a +1/+1 counter on Syr Ginger and scry 1.
{2}, {t}, Sacrifice Syr Ginger: You gain life equal
to its power.