Thrasios, Triton Hero / Yoshimaru, Ever Faithful

How it plays & wins

This is a creature-based midrange shell with a lot of free interaction. It opens with fast mana like Sol Ring, Mana Vault, Chrome Mox, Ancient Tomb and a pile of mana dorks, then uses Thrasios and Yoshimaru as flexible commanders. Gaea's Cradle, Cryptolith Rite and Training Grounds turn creatures into mana. Green Sun's Zenith, Chord of Calling, Eternal Witness and Ecological Appreciation find and rebuy the right creature. Rhystic Study, Mystic Remora and Esper Sentinel tax opponents, while Force of Will, Fierce Guardianship, Pact of Negation, Silence and Veil of Summer protect the key turn.

The win condition is not clear from the list, and no infinite combo was detected. It looks like a grindy deck that builds a mana and card advantage lead, then wins through combat or a big creature-driven turn. That is my best guess, not a confirmed line.

Analysis written with AI assistance based on this decklist.