Poison Ivy, Sweet Death

Forestwalk, Deathtouch
At the beginning of your upkeep, create a 1/1
Plant token.
{t}{x}{b}{b}: Charm target hero creature with
converted mana cost X or less. When Poison Ivy
leaves the battlefield, return the charmed
creature to its owner's control (Create a Charm
aura token and attach it to target creature, then take control of it.)