Certified PSA 10 Gem Mint, it guarantees a perfect condition and is a major piece for any high-end Pokmon collection
If you then reach the eight counter threshold, you get basically a second hand, with the stuff in your graveyard suddenly available to return to the fray
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.) When this creature enters, put target creature card from an opponent's graveyard onto the battlefield under your control
With all of the ways to flicker and reanimate creatures out there, you can easily reuse Karmic Guides ETB again and again
Zacama, Primal Calamity is also an option but makes for a poor Dinosaur commander as you'd much rather build a Big Ramp deck focused on abusing Zacama's activated abilities