Sword of Hours 
Artifact — Equipment
$5.43 #5102 0.00 5.2 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
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Fractal Harness90%
$0.25↓#6379↓0.29↑5.5 years
"Whenever equipped creature attacks, double the number of +1/+1 counters on it."
+2 more matching lines
Seismic Tutelage88%
$0.90↓#11095↓0.31↑0.9 years↓
"Whenever enchanted creature attacks, double the number of +1/+1 counters on it."
Armory of Iroas83%
$0.23↓#8026↓0.27↑12.5 years↑
"Whenever equipped creature attacks, put a +1/+1 counter on it."
+1 more matching line
Bone Sabres83%
$4.79↓#61140.074.0 years↓
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Byrke, Long Ear of the Law80%
$7.22↑#60290.14↑2.2 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%
$0.36↓#51810.22↑2.5 years↓
"Whenever this creature attacks while saddled, double the number of +1/+1 counters on target creature."
+1 more matching line
Hydra's Growth79%
$1.23↓#2156↑0.34↑6.7 years↑
"At the beginning of your upkeep, double the number of +1/+1 counters on enchanted creature."
Ascendant Acolyte78%
$0.32↓#11286↓0.29↑4.7 years
"At the beginning of your upkeep, double the number of +1/+1 counters on this creature."
Lily Bowen, Raging Grandma76%
$0.46↓#7080↓0.25↑2.6 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."
Level Up76%
$1.70↓#3963↑0.60↑0.6 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 Hydra75%
$1.37↓#2429↑0.55↑15.3 years↑
"At the beginning of your upkeep, double the number of +1/+1 counters on this creature."
Glowcap Lantern75%
$0.22↓#11644↓0.002.9 years↓
"Equip "
"
Greatsword of Tyr74%
$0.35↓#7399↓0.22↑4.4 years
"Whenever equipped creature attacks, put a +1/+1 counter on it and tap up to one target creature defending player controls."
Turtle Van74%
$0.28↓#15041↓0.33↑0.6 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."
Casey Jones, Back Alley Brute73%
$0.31↓#7179↓0.32↑0.6 years↓
"Whenever this card attacks, put a +1/+1 counter on target attacking creature."
+1 more matching line
Kalonian Hydra73%
$6.14↑#1136↑0.48↑13.3 years↑
"Whenever this creature attacks, double the number of +1/+1 counters on each creature you control."
Sazh Katzroy72%
$0.51↓#51190.25↑1.4 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%
$1.28↓#47960.31↑0.6 years↓
"Whenever this creature attacks, double the number of +1/+1 counters on it."
Bright-Palm, Soul Awakener72%
$0.28↓#9818↓0.20↑3.5 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."
Gleam of Battle72%
$0.14↓#13930↓0.17↑13.5 years↑
"Whenever a creature you control attacks, put a +1/+1 counter on it."