This can get out of hand with just a few small instants and sorceries, and some decks are dedicated to winning with storm alone
Speed skirts my rule about not wanting to track things in the game, but there are few ways to lose speed and youre only tracking your own
Magecraft Whenever you cast or copy an instant or sorcery spell, create a Treasure token
Azlask, the Swelling Scourge throws that right out the window, giving all your Spawn tokens and Scion tokens Annihilator 1 (as well as indestructible)
If multiple other nontoken permanents you control leave the battlefield simultaneously, you must still choose different modes for each instance of the triggered ability that's put onto the stack
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