Radioactive Man {4}{B}
Legendary Creature — Human Scientist Villain
Deathtouch
Whenever Radioactive Man deals combat damage to a player, that player loses half their life, rounded up.
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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.
Shredder, Shadow Master 100%
$0.94#6431
"Whenever this card deals combat damage to a player, that player loses half their life, rounded up."
Scourge of the Skyclaves 88%
$0.53#11439
"When you cast this spell, if it was kicked, each player loses half their life, rounded up."
Raving Dead 88%
$1.21#16150
"Whenever this creature deals combat damage to a player, that player loses half their life, rounded down."
+1 more matching line
Ebonblade Reaper 87%
$7.13#9762
"Whenever this creature deals combat damage to a player, that player loses half their life, rounded up."
Fraying Omnipotence 84%
$1.04#8473
"Each player loses half their life, then discards half the cards in their hand, then sacrifices half the creatures they control of their choice. Round up each time."
Pox Plague 84%
$0.33#11937
"Each player loses half their life, then discards half the cards in their hand, then sacrifices half the permanents they control of their choice. Round down each time."
Urgoros, the Empty One 83%
$0.26#18626
"Whenever this card deals combat damage to a player, that player discards a card at random. If the player can't, you draw a card."
Alpharael, Stonechosen 82%
$0.39#10882
"Whenever this card attacks, if a nonland permanent left the battlefield this turn or a spell was warped this turn, defending player loses half their life, rounded up."
Neheb, the Worthy 82%
$0.26#16201
"Whenever this card deals combat damage to a player, each player discards a card."
Scytheclaw 81%
$0.26#7251
"Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up."
Quietus Spike 81%
$1.75#2690
"Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up."
Unstoppable Slasher 81%
$4.89#1615
"Whenever this creature deals combat damage to a player, they lose half their life, rounded up."
+1 more matching line