Sword of Hours 
Artifact — Equipment
$5.01 #4996 0.34 5.1 years
Whenever equipped creature attacks, put a +1/+1 counter on it.
Whenever equipped creature deals combat damage, roll a d12. If the result is greater than the damage dealt or the result is 12, double the number of +1/+1 counters on that creature.
Equip (: Attach to target creature you control. Equip only as a sorcery.)
(: Attach to target creature you control. Equip only as a sorcery.)Click a line or tag to filter
Cards similar to Sword of Hours 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.
Fractal Harness90%
$0.30↓#6428↓0.07↓5.4 years
"Whenever equipped creature attacks, double the number of +1/+1 counters on it."
+2 more matching lines
Seismic Tutelage88%
$0.88↓#11409↓0.00↓0.8 years↓
"Whenever enchanted creature attacks, double the number of +1/+1 counters on it."
Armory of Iroas83%
$0.22↓#7937↓0.22↓12.3 years↑
"Whenever equipped creature attacks, put a +1/+1 counter on it."
+1 more matching line
Bone Sabres83%
$5.73↑#59580.24↓3.9 years↓
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Byrke, Long Ear of the Law82%
$6.85↑#59270.292.1 years↓
"Whenever a creature you control with a +1/+1 counter on it attacks, double the number of +1/+1 counters on it."
Ornery Tumblewagg80%
$0.34↓#49900.90↑2.4 years↓
"Whenever this creature attacks while saddled, double the number of +1/+1 counters on target creature."
+1 more matching line
Hydra's Growth79%
$1.08↓#2107↑0.346.6 years↑
"At the beginning of your upkeep, double the number of +1/+1 counters on enchanted creature."
Ascendant Acolyte78%
$0.34↓#10992↓0.06↓4.5 years
"At the beginning of your upkeep, double the number of +1/+1 counters on this creature."
Lily Bowen, Raging Grandma76%
$0.51↓#6967↓0.00↓2.5 years↓
"At the beginning of your upkeep, double the number of +1/+1 counters on this card if its power is 16 or less. Otherwise, remove all but one +1/+1 counter from it, then you gain 1 life for each +1/+1 counter removed this way."
Kalonian Hydra76%
$5.87↑#1120↑0.45↑13.1 years↑
"Whenever this creature attacks, double the number of +1/+1 counters on each creature you control."
Level Up76%
$2.34↓#43910.00↓0.5 years↓
"Enchanted creature has "Whenever this creature attacks, double the number of +1/+1 counters on it. Then if it has power 10 or greater, draw a card.""
Primordial Hydra74%
$1.39↓#2463↑0.45↑15.1 years↑
"At the beginning of your upkeep, double the number of +1/+1 counters on this creature."
Glowcap Lantern74%
$0.24↓#11320↓0.00↓2.8 years↓
"Equip "
"
Greatsword of Tyr74%
$0.39↓#7230↓0.324.2 years
"Whenever equipped creature attacks, put a +1/+1 counter on it and tap up to one target creature defending player controls."
Casey Jones, Back Alley Brute74%
$0.31↓#7643↓0.00↓0.5 years↓
"Whenever this card attacks, put a +1/+1 counter on target attacking creature."
+1 more matching line
Turtle Van74%
$0.31↓#15216↓0.00↓0.5 years↓
"Whenever this Vehicle attacks, put a +1/+1 counter on target creature that crewed it this turn. Then if that creature is a Mutant, Ninja, or Turtle, double the number of +1/+1 counters on it."
Armasaur Guide72%
$0.17↓#17748↓0.05↓1.8 years↓
"Whenever you attack with three or more creatures, put a +1/+1 counter on target creature you control."
Sazh Katzroy72%
$0.66↓#52210.20↓1.2 years↓
"Whenever this card attacks, put a +1/+1 counter on target creature, then double the number of +1/+1 counters on that creature."
Big Mother Mouser72%
$2.05↓#52790.00↓0.5 years↓
"Whenever this creature attacks, double the number of +1/+1 counters on it."
Bright-Palm, Soul Awakener72%
$0.26↓#9543↓0.67↑3.4 years↓
"Whenever this creature attacks, double the number of +1/+1 counters on target creature. That creature can't be blocked by creatures with power 2 or less this turn."