Shigeki, Jukai Visionary

A creature designed never to quite leave. The tap ability returns Shigeki to its owner's hand rather than sacrificing it, so the same body seeds the graveyard again and again for two mana a pop, digging four deep to drop a land onto the battlefield while dumping the rest underneath. That is the slow, repeatable engine: mill and ramp, one bounce at a time, patient and passive. The Channel line is the opposite gear, an expensive one-shot that discards Shigeki from hand and scales with X to haul a whole graveyard's worth of nonlegendary cards back at once. That word "nonlegendary" is the honest tax: Shigeki can restock itself endlessly through the tap, but it can never be one of the cards Channel returns, so the engine feeds a payoff it is structurally excluded from. The two halves are deliberately mismatched in cost and rhythm: cheap and grinding on the mill side, explosive and terminal on the recovery side, since Channel spends the card to cash the accumulation in. It reads as green ramp-and-dig, but functionally it is a self-milling setup piece bolted to a mass-recursion finisher; the tap does the burying, the Channel does the reclaiming, and the same card handles both jobs at opposite speeds. When the board wants cards back now, you discard it for the payoff; when there is time to spare, the little druid keeps tapping and returning, filling the yard it will eventually be thrown away to empty.