Ordeal of Thassa 
Enchantment — Aura
$0.13 #16007 0.80 12.9 years
Enchant creature
Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura.
When you sacrifice this Aura, draw two cards.
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Ordeal of Heliod99%
$0.11↓#157930.00↓12.9 years
"Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura."
+1 more matching line
Ordeal of Purphoros98%
$0.08↓#20027↓0.50↓13.0 years
"Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura."
Ordeal of Erebos97%
$0.15↑#23269↓0.57↓12.9 years
"Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura."
Ordeal of Nylea96%
$0.14↑#4182↑0.19↓12.9 years
"Whenever enchanted creature attacks, put a +1/+1 counter on it. Then if it has three or more +1/+1 counters on it, sacrifice this Aura."
Capashen Standard74%
$0.18↑#25149↓0.24↓27.2 years↑
"
, Sacrifice this Aura: Draw a card."
, Sacrifice this Aura: Draw a card."
Bone Sabres73%
$5.73↑#5958↑0.24↓3.9 years↓
"Whenever equipped creature attacks, put four +1/+1 counters on it."
Armory of Iroas73%
$0.22↑#7937↑0.22↓12.3 years
"Whenever equipped creature attacks, put a +1/+1 counter on it."
Font of Fortunes72%
$0.04↓#23167↓0.00↓12.3 years
", Sacrifice this enchantment: Draw two cards."
, Sacrifice this enchantment: Draw two cards."
Armasaur Guide70%
$0.17↑#177480.05↓1.8 years↓
"Whenever you attack with three or more creatures, put a +1/+1 counter on target creature you control."
Casey Jones, Back Alley Brute70%
$0.31↑#7643↑0.00↓0.5 years↓
"Whenever this card attacks, put a +1/+1 counter on target attacking creature."
Elite Scaleguard70%
$0.09↓#8808↑0.06↓11.6 years↓
"Whenever a creature you control with a +1/+1 counter on it attacks, tap target creature defending player controls."
Songbirds' Blessing70%
$0.57↑#3348↑0.39↓3.0 years↓
"Enchant creature"
Curse of Predation70%
$0.20↑#145200.25↓12.8 years
"Whenever a creature attacks enchanted player, put a +1/+1 counter on it."