Opal Palace

Every commander accrues an escalating tax each time it dies and returns, and this land is the lever that converts that ledger into a body rather than an absorbed cost. The second ability stamps a +1/+1 counter onto the general for each time it has been cast from the command zone this game, including the casting you are paying for right now, so a commander recast for the third time arrives with three counters waiting. By the fourth or fifth return a general that has been chumped or repeatedly removed shows up oversized, sometimes lethally so for a deck built around commander damage. The cost structure is deliberately steep, and the sequencing is the discipline: an extra generic mana on top of the tap, color-gated to your commander's identity, and the counters only land if you spend that specific mana on casting the commander itself. The catch is precise: the bonus attaches to using this land's mana to cast your commander, wherever that commander happens to be. It is the running total of command-zone casts, not the location of the current one, that sets the counter count, so a general recurred from the graveyard or exile still cashes in on the history the command zone has recorded. As fixing it is unremarkable: a colorless tap or a one-mana filter for a single color inside the commander's identity. The counters are the only reason it earns a slot, and only in a deck whose plan deliberately runs through repeated commander casts.