5000 yugioh cards YU-GI-OH! Konami Five-Headed Dragon LC03-EN004 - Legendary Collection 3: - Limited Edition some in Japanese Yu-Gi-Oh! OCG/TIN]Five-Headed Dragon BPCT-JP005 Ultimate

Top chase cards in Paradox Rift include Groudon ex SIR, Altaria ex SIR, Roaring Moon ex SIR and the Steelix IR

These sets are from the mid-2000s to early-2010s

They restocked the ones for Shrouded Fable after it came out so maybe

Cards like Abrade, Shattering Spree, Rack and Ruin, Untimely Malfunction, and Fiery Confluence can all trigger his ability while clearing opposing threats especially if you use Mycosynth Lattice to make all permanent cards artifacts

You can build your own army of Squirrels with some Food token synergies

Im also reminded of Mirrorform from Lorwyn Eclipsed, which transforms all of your non-land permanents into a copy of a non-aura permanent