Svyvs, Dark Rune-Tamer

Enrage — Whenever Svyvs, Dark Rune-Tamer is
dealt damage, put a +1/+1 counter on her, then
draw a card. Svyvs becomes a black demon with
flying until the end of turn. As long as Svyvs is a demon, it has "{1}{b}: Target creature has
undying."
{1}{u}{r}, Discard a card: deals 1 damage to target creature or planeswalker.
Partner (You can have two commanders if both
have partner.)