Phyrl, Bound Queen

Flying, hexproof
When Phyrl, Bound Queen enters the battlefield, create Driska, a legendary 4/4 black Dragon
Spirit creature token with flying, deathtouch, and
"When Driska dies, if you control a creature
named Phyrl, Bound Queen, sacrifice it."
When Phyrl dies, if you control a creature named Driska, sacrifice it.