Also, reanimate our creatures could re-trigger amazing abilities like Gray Merchant of Asphodel Ramp The Reaver Cleaver is a fantastic piece of equipment that only needs one hit to let us cast the top of our curve many turns earlier
Manriki-Gusari is a real honorable mention here, since this was an equipment from Saviors of Kamigawa that was exclusively played to be able to destroy opposing Jittes
Even without a clear exploit, giving your tokens menace and generating an additional attacker each combat phase lets this red enchantment apply plenty of pressure
While none of the competitive success has to do with it being a dinosaur, you could undoubtedly satisfy the companion requirement with a dino build since they have a naturally high mana value for the most part
Slickshot Show-Off Festival Crasher always needed haste
He can also manipulate the life force of his enemies, draining their energy and using it to fuel his own power