Flaroka, the Mist-Mage

Flying, deathtouch.
Whenever Flaroka, the Mist-Mage deals
combat damage to a player you may surveil X
where X is the amount of damage dealt.
Whenever you lose life for the first time each
turn you may pay {1}{u}{u}{b}. If you do target
creature gets -X/-X until end of turn where X is
the amount of life lost.