Finding enough ways to bounce the ring to your hand will be a bit difficult, but if you're also willing to sacrifice it and return it from your graveyard, things get a whole lot easier, even in colorless
Creatures (27) 2 Kird Ape 1 Keldon Marauders 4 Wild Nacatl 4 Goblin Guide 4 Burning-Tree Emissary 4 Experiment One 4 Reckless Bushwhacker 4 Hidden Herbalists Lands (20) Spells (13) Im not sure Keldon Marauders is going to prove high-impact enough, but the theory is that combining it with Reckless Charge is especially effective (since normally it only gets one hit in)
"Phantasm Spiral Assault" is a Trap Card that empowers the Normal Monster "Phantasm Spiral Dragon": You win the Duel if that monster destroys three Effect Monsters by battle, but only if it does so while equipped with at least one copy each of "Phantasm Spiral Crash," "Phantasm Spiral Grip," and "Phantasm Spiral Wave." "Flying Elephant" can prevent its destruction by a card effect once per turn, and if inflicts damage with a direct attack the turn after activating its effect, you win the duel
Warriors seems is one of the decks that is easiest to throw together, but it will take some time to refine it and figure out the optimal threats and numbers
Prismari CommandPrismari Command (53,819 Inclusions, 5% of 1,095,004 Decks) I think I'm on my dozenth or so article dunking on Prismari CommandPrismari Command, so long-term readers will know that I am in no way a fan of this card