Cheapest priced copy (Legions): $0.35 at Card Kingdom, near mint, their price list as of .
Krosan Vorine 
Creature — Cat Beast · 3/2 · Common · Legions · #131
Provoke (Whenever this creature attacks, you may have target creature defending player controls untap and block it if able.)
This creature can't be blocked by more than one creature.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern