The Most Dangerous Gamer 
Legendary Creature — Human Gamer Guest
Deathtouch Whenever The Most Dangerous Gamer enters or attacks, open an Attraction. Whenever you open an Attraction, put a +1/+1 counter on The Most Dangerous Gamer. Whenever you claim the prize of an Attraction, destroy target permanent.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderLEGAL