Arima, The White Reaper

Haste, Vigilance, Double Strike, Trample, Reach, Lifelink, Hexproof.
Betrayal (At the beginning of your upkeep, each
player exiles one creature every turn for each
permanent on the board. For every creature sacrificed
this way, this creature gains a Betrayal counter.)
This creatures power is equal to the amount of
betrayal counters on the board