pokemon card goodra - Sword & Shield - Lost Origin - Hisuian VSTAR Pokémon Hit Points160 HP Form Goodra Vmax gx ex Vstar

Gym Leader Challenge is a popular example and is one of many listed in the Alternative Play Handbook linked below

All you need is a demon in play to draw cards and siphon life each turn, and you can even create one when you unlock Ritual Chamber

(10/1/2007) If there are no nonland permanents on the battlefield other than an Oblivion Ring, and the card it exiled was another Oblivion Ring, casting a third Oblivion Ring will result in an involuntary infinite loop that will end the game in a draw (unless someone chooses to break it by putting another nonland permanent onto the battlefield or destroying one of the Oblivion Rings, for example)

If you can find Shining Fates at your local store then it is another great set to invest in that will likely hold its price in the future