Yanmega

You may sacrifice a creature named Yanma rather
than pay this spells mana cost.
Flying, first strike, flanking, ingest, trample, haste
Whenever Yanmega taps, surveil 1. {p/c}{p/c}: Yanmega gains flanking until end of turn. {1}, {t}: Yanmega deals damage equal to its power
to target attacking or blocking creature. {2}, {t}: Target player's creatures get -X/-X until
end of turn, where X is half of Yanmega's
toughness rounded