Blitzball Shot
Need to guarantee that combat damage connects? This 2-mana green instant gives target creature +3/+3 and Trample. Target Tidus to blast through blockers, force the Cheer trigger, and secure that sudden-death stadium victory!

Tidus, Yuna's Guardian
Looking for a captain? Tidus is a 3-mana legendary athlete who moves counters around. Both Contested Ball Game and Strixhaven Stadium use Points counters, you can push the Stadium to 10 faster, and when he scores, you get to proliferate those counters, and draw a card!

Blitzball Stadium
Every team needs a home field. Strixhaven Stadium is a 3-drop artifact that taps for mana and gains "point counters" when your creatures deal combat damage to an opponent. If it reaches 10 or more counters, you score a sudden-death victory and that player loses the game!

Contested Game Ball
You can't have a match without a ball! This 2-mana artifact literally gets passed back and forth across the table whenever you take combat damage. If you manage to hold possession and score 5 "point counters," you draw cards and create Treasure!