Source: Action Network
When Ozox dies, create Jumblebones, a legendary 2/1 black Skeleton creature token with Jumblebones cant block and When Jumblebones leaves the battlefield, return target card named Ozox, the Clattering King from your graveyard to your hand. Illustrated by Inuchiyo Meimaru Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Legal Modern Not Legal Brawl Legal Legacy Legal Comp
Once Sahagin has been blocked, casting a noncreature spell in order to cause Sahagin's ability to trigger won't cause Sahagin to become unblocked
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Some of my favorites unique to the deck are Chaos Dragon, Territorial Hellkite, Warmonger Hellkite, and Vengeful Ancestor, which force attacks to trigger Firkraag and continue to lay the smackdown themselves
The robot dog can gain Energy counters through combat damage and even has a new MTG mechanic called Brain counters that lets Rex have all the activated abilities from creatures in exile with Brain counters