Pyromancer's Swath 

Enchantment
If an instant or sorcery source you control would deal damage to a permanent or player, it deals that much damage plus 2 to that permanent or player instead.
At the beginning of each end step, discard your hand.
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Cards that do something similar expected a card that isn't here?
Reports become test cases the matcher is graded against before an update ships. Delvefall isn't a chatbot guessing, it compares the printed rules text of every card with plain math, and examples like yours decide which differences should count.
Narset, Jeskai Waymaster 95%
$0.23#11990
"At the beginning of your end step, you may discard your hand. If you do, draw cards equal to the number of spells you've cast this turn."
Pyromancer's Gauntlet 91%
$0.32#15289
"If a red instant or sorcery spell you control or a red planeswalker you control would deal damage to a permanent or player, it deals that much damage plus 2 to that permanent or player instead."
Sire of Insanity 86%
$0.53#8673
"At the beginning of each end step, each player discards their hand."