Usually creatures, but you can do some cool stuff with the best lands, or heck, even the pretty good planeswalkers
There are very specific commanders or strategies that actually want to run as many clone effects as possible
How about a three-piece combo of Hi-Potion, Ether, and Phoenix Pinion for 444 Gil? Illustrated by Hendry Iwanaga Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
These include some huge names in Commander, such as The Ozolith (now as Argonath, Pillar of Kings), Cloudstone Curio (Elessar, the Elfstone), Minamo, School at Waters Edge (Dol Amroth) and even Ancient Tomb (Balins Tomb)
Veteran Adventurer Ill talk about Veteran Adventurer a little later for its ambiguous creature type ability
2024-07-26 If a creature with toxic deals combat damage to a creature or planeswalker, or if it deals noncombat damage, toxic has no effect and no player gets poison counters