Gnarlbark Elm (#103)

Type: Creature — Treefolk Warlock

Text: This creature enters with two -1/-1 counters on it.
{2}{B}, Remove two counters from this creature: Target creature gets -2/-2 until end of turn. Activate only as a sorcery.

It greedily drinks boggart curses and returns their pain in kind.

Set: Lorwyn Eclipsed (#103)