While Trinisphere is one of the strongest artifacts out there, you surely wouldn't run it in a Jhoira, Weatherlight Captain artifact storm deck because it would grind your deck to a halt
The only limit on the deck size is that you have to be able to shuffle it on your own without assistance, and that your sideboard can be no larger than 15 cards
And just because I list it below doesn't mean it's going to show up any time soon
A monument to long-forgotten gods, it stands as a tribute to the fleeting nature of human ways
This six-mana black creature is a 6/5 with flying, and powerful ward effect that requires an opponent to sacrifice a creature if they want to counter it, and has an added effect of whenever a creature dies, an opponent loses two life and you gain two life
2) Any Pokmon can go on your Trainer Card