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These are the lists we can expect to see making a splash this weekend

Explore Magic with Lara Croft

The original "Polymerization" Normal Spell Card in particular is the most used "Fusion"/"Polymerization" Spell since it can be directly searched by a few "HERO" monsters: "Elemental HERO Blazeman", "Elemental HERO Spirit of Neos", "Elemental HERO Woodsman" and "Vision HERO Vyon"

Those cards were strong enough in the early meta that their counters had a feasible reason to exist in an opponent's Deck

The One Ring could arguably have been the card to start that trend, but TOR was also popular in Modern and Legacy, where The Soul Stone is categorically for Commander players