Annis, Vengeful Warlord

At the beginning of your upkeep, create a 1/1
white human warrior creature token with {t}:
destroy target knight.
At the beginning of your upkeep, if you or an
opponent controls a Morgana planeswalker,
transform Annis, Vengeful Warlord.
"You are consumed with bitterness, Morgana. I side
with your brother, the once and future king."