Shriekwood Devourer 


Creature — Treefolk
Trample
Whenever you attack with one or more creatures, untap up to X lands, where X is the greatest power among those creatures.
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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.
Karlach, Fury of Avernus 94%
$25.13#1039
"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."
Reveille Squad 92%
$0.28#17354
"Whenever one or more creatures attack you, if this creature is untapped, you may untap all creatures you control."
Aurelia, the Warleader 88%
$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 88%
$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 87%
$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 87%
$0.33#28941
"Whenever a creature attacks and isn't blocked this combat, untap it and remove it from combat."
Godo, Bandit Warlord 85%
$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."
Bumi, Unleashed 85%
$4.21#3926
"Whenever this card deals combat damage to a player, untap all lands you control. After this phase, there is an additional combat phase. Only land creatures can attack during that combat phase."
Finest Hour 84%
$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."
Raphael, Tag Team Tough 84%
$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."
Jangling Automaton 84%
$0.11#21680
"Whenever this creature attacks, untap all creatures defending player controls."
Raggadragga, Goreguts Boss 83%
$0.22#7103
"Whenever a creature you control with a mana ability attacks, untap it."
Copperhorn Scout 83%
$0.27#5520
"Whenever this creature attacks, untap each other creature you control."
Full Throttle 83%
$6.07#1495
"At the beginning of each combat this turn, untap all creatures that attacked this turn."
Tadeas, Juniper Ascendant 83%
$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."
Taranika, Akroan Veteran 83%
$0.30#14888
"Whenever this card attacks, untap another target creature you control. Until end of turn, that creature has base power and toughness 4/4 and gains indestructible."
Scourge of the Throne 83%
$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."
Genji Glove 82%
$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."