Omega Flowey

First Strike, Flying, Haste, Trample, Hexproof.
If Omega Flowey kills a creature in any way, add
a Soul counter on Omega Flowey, Omega Flowey
gets X +1/+1 counters, where X is equivalent to
how many soul counters Omega Flowey has. At
your beginning step, sacrifice a soul counter.
"Flowey absorbed all six human souls, an impossibility, yet done."