Relentless Rats is similar, with regular copies at around $3 but Secret Lair printings reach as high as $15

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Also, any spell or ability that says "any target" can target a battle, so get ready to stoke the flames of war
Cue Bolas arriving at the last second, with the reveal that killing her demons means he now has ownership of her soul
The call here was that while there are a lot of places where the card needed to be modified into a vertical aspect, being horizontal was an important part of the identity of battles, and it helps communicate just how unique this new permanent is