Delvefall
Karlach, Fury of Avernus

Karlach, Fury of Avernus {4}{R}

Legendary Creature — Tiefling Barbarian

Whenever you attack, if it's the first combat phase of the turn, untap all attacking creatures. They gain first strike until end of turn. After this phase, there is an additional combat phase.
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Cards that do something similar expected a card that isn't here?

Reveille Squad
Reveille Squad 95%
$0.28#17354
"Whenever one or more creatures attack you, if this creature is untapped, you may untap all creatures you control."
Shriekwood Devourer
Shriekwood Devourer 94%
$0.38#5464
"Whenever you attack with one or more creatures, untap up to X lands, where X is the greatest power among those creatures."
Aurelia, the Warleader
Aurelia, the Warleader 91%
$4.43#820
"Whenever this card attacks for the first time each turn, untap all creatures you control. After this phase, there is an additional combat phase."
Akki Battle Squad
Akki Battle Squad 90%
$4.73#3876
"Whenever one or more modified creatures you control attack, untap all modified creatures you control. After this phase, there is an additional combat phase. This ability triggers only once each turn."
Raph & Leo, Sibling Rivals
Raph & Leo, Sibling Rivals 90%
$0.74#9787
"Whenever this card attack, if it's the first combat phase of the turn, untap one or two target attacking creatures. After this phase, there is an additional combat phase."
Melee
Melee 90%
$0.33#28941
"Whenever a creature attacks and isn't blocked this combat, untap it and remove it from combat."
Godo, Bandit Warlord
Godo, Bandit Warlord 89%
$1.03#3192
"Whenever this card attacks for the first time each turn, untap it and all Samurai you control. After this phase, there is an additional combat phase."
Finest Hour
Finest Hour 88%
$1.17#8384
"Whenever a creature you control attacks alone, if it's the first combat phase of the turn, untap that creature. After this phase, there is an additional combat phase."
Scourge of the Throne
Scourge of the Throne 88%
$0.39#1277
"Whenever this creature attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase."
+1 more matching line
Jangling Automaton
Jangling Automaton 87%
$0.11#21680
"Whenever this creature attacks, untap all creatures defending player controls."
Raggadragga, Goreguts Boss
Raggadragga, Goreguts Boss 87%
$0.22#7103
"Whenever a creature you control with a mana ability attacks, untap it."
Raphael, Tag Team Tough
Raphael, Tag Team Tough 87%
$6.19#11735
"Whenever this card deals combat damage to a player for the first time each turn, untap all attacking creatures. After this combat phase, there is an additional combat phase."
Copperhorn Scout
Copperhorn Scout 87%
$0.27#5520
"Whenever this creature attacks, untap each other creature you control."
Preston Garvey, Minuteman
Preston Garvey, Minuteman 86%
#12464
"Whenever this card attacks, untap each enchanted permanent you control."
Genji Glove
Genji Glove 86%
$8.58#1233
"Whenever equipped creature attacks, if it's the first combat phase of the turn, untap it. After this phase, there is an additional combat phase."
Hexplate Wallbreaker
Hexplate Wallbreaker 86%
$7.69#3483
"Whenever equipped creature attacks, if it's the first combat phase of the turn, untap each attacking creature. After this phase, there is an additional combat phase."
Cat-Owl
Cat-Owl 85%
$0.18#18974
"Whenever this creature attacks, untap target artifact or creature."
Shakedown Heavy
Shakedown Heavy 85%
$0.35#6566
"Whenever this creature attacks, defending player may have you draw a card. If they do, untap this creature and remove it from combat."
Full Throttle
Full Throttle 85%
$6.07#1495
"At the beginning of each combat this turn, untap all creatures that attacked this turn."
Tadeas, Juniper Ascendant
Tadeas, Juniper Ascendant 84%
$1.15#12242
"Whenever a creature you control with reach attacks, untap it and it can't be blocked by creatures with greater power this combat."