Currently, all Sieges in the game come from the same set, March of the Machine, and this is the only type of Battle card released thus far
Im not talking about broken combos, but actual complicated scenarios that players will argue tooth and nail on how they are supposed to resolve, given how the game is played
If the format is all about fixing mana, casting bombs, and generating card advantage, then its difficult to justify spending a slot on something like Arashin Sunshield or Dragonback Lancer
Back in the day, people would pair it with cards like Cunning Sparkmage to kill any creature on the spot
2 Mech Island, By Robin Olausson The full-art Mech lands introduced in The Brothers War break a fundamental rule of basic lands by featuring mechanical characters prominently rather than just landscapes