Shredder, Shadow Master {3}{B}{B}
Legendary Creature — Human Ninja
Whenever Shredder attacks a player, for each other opponent, create a token that's a copy of Shredder tapped and attacking that player, except it isn't legendary. Sacrifice those tokens at end of combat.
Whenever Shredder 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?
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Radioactive Man 100%
$0.76#24925
"Whenever this card deals combat damage to a player, that player loses half their life, rounded up."
Calamity, Galloping Inferno 89%
$0.29#6324
"Whenever this card attacks while saddled, choose a nonlegendary creature that saddled it this turn and create a tapped and attacking token that's a copy of it. Sacrifice that token at the beginning of the next end step. Repeat this process once."
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."
Ebonblade Reaper 87%
$7.13#9762
"Whenever this creature deals combat damage to a player, that player loses half their life, rounded up."
Fire Lord Azula 87%
$1.66#3905
"Whenever you cast a spell while this card is attacking, copy that spell. You may choose new targets for the copy."
Ma Chao, Western Warrior 86%
$80.20#26861
"Whenever this card attacks alone, it can't be blocked this combat."
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."
Mardu Siegebreaker 83%
$0.46#3889
"Whenever this creature attacks, for each opponent, create a tapped token that's a copy of the exiled card attacking that opponent. At the beginning of your next end step, sacrifice those tokens."
Tanazir Quandrix 83%
$0.25#8639
"Whenever this card attacks, you may have the base power and toughness of other creatures you control become equal to this card's power and toughness until end of turn."
Suppressor Skyguard 82%
$12.54#9077
"Whenever a player attacks you, if that player has another opponent who isn't being attacked, prevent all combat damage that would be dealt to you this combat."
Living Laser 82%
#15971
"Whenever this card attacks, for each card you've discarded this turn, create a token that's a copy of this card, except the token isn't legendary. The tokens enter tapped and attacking. Exile the tokens at the beginning of the next end step."
Tahngarth, First Mate 82%
$0.23#15357
"Whenever an opponent attacks with one or more creatures, if this card is tapped, you may have that opponent gain control of this card until end of combat. If you do, choose a player or planeswalker that opponent is attacking. this card is attacking that player or planeswalker."
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."
Gwenom, Remorseless 81%
$4.47#3139
"Whenever this card attacks, until end of turn, you may look at the top card of your library any time and you may play cards from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost."
Scytheclaw 81%
$0.26#7251
"Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up."