It ended up being the perfect fit, and "dark transformation" became a major theme of the set
You don't have to cast a spell as that ability resolves
Or of course, use it to save a creature from removal or just re-up on a powerful enter the battlefield trigger
Perfect Fit for 57.5 x 89 mm Cards: Compatible with Wingspan, Star Wars: Rebellion, Scythe, Age of Innovation, Star Wars: Imperial Assault, Maracaibo, and other 57.5 x 89 mm gaming cards, these soft card sleeves deliver a precise fit that supports smooth shuffling and reliable protection for every playing card sleeve in your deck
Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell
That reflects the fact that there are many Treefolk at 4-6 drops and that makes our deck a bit slower than usual, but our high toughness strategy is able to protect us from early threats