Marielle, Grim Wanderer

: Marielle, Grim Wanderer enters the battlefield with X +1/+1 counters on it and X loyalty counters on it.
+1: Marielle, Grim Wanderer becomes a 0/0 creature until end of turn. Put a +1/+1 counter on it. It gains menace or deathtouch until the end of turn.
-X: Put X +1/+1 counters on Marielle, Grim Wanderer.