Realmbreaker, the Invasion Tree

Two abilities stacked on the same artifact, and they are not at odds: they are two stages of one plan. The repeatable mill is the setup, poaching whatever lands surface from the opponent's graveyard and stapling an exile-replacement clause onto each one, so those stolen lands never crawl back to their owner or anywhere else. That clause is the quiet cruelty of the design. You are not borrowing a land, you are hollowing out a manabase and permanently deleting each piece the moment it would leave your side, turning a slow value grind into a one-way theft that leaves nothing to reanimate or return. Every activation also drags you toward the payoff the card is named for: sink ten mana and give it up to fetch any number of Praetors, dropping them straight into play without casting them or paying their colors. The mill half buys time and shreds the opponent's resources while you assemble the mana for the haymaker; both modes want the same long, attritional game. The single real friction is the search's reach. It only touches the library, so any Praetor sitting in hand, milled to a graveyard, or left aside is stranded. The deckbuilding onus is on keeping the compleat pantheon in the deck rather than drawing into it, a strange discipline: this engine grinds not to keep the game small, but to fund an army it summons all at once.