Aisling Leprechaun 
Creature — Faerie
$0.61 #29862 0.25 32.3 years
Whenever this creature blocks or becomes blocked by a creature, that creature becomes green. (This effect lasts indefinitely.)
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Dream Fighter77%
$0.08↓#274780.00↓29.9 years↓
"Whenever this creature blocks or becomes blocked by a creature, this creature and that creature phase out."
Cleric of Chill Depths76%
$0.18↓#23365↑0.38↑5.9 years↓
"Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Labyrinth Minotaur76%
$0.11↓#301620.14↓30.9 years↓
"Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Abomination74%
$0.19↓#261640.11↓32.3 years
"Whenever this creature blocks or becomes blocked by a green or white creature, destroy that creature at end of combat."
Wall of Frost74%
$0.19↓#4831↑0.3017.1 years↓
"Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step."
Serra Inquisitors74%
$0.17↓#313590.3330.9 years↓
"Whenever this creature blocks or becomes blocked by one or more black creatures, this creature gets +2/+0 until end of turn."
Lim-Dûl's Cohort74%
$0.19↓#314730.53↑31.3 years↓
"Whenever this creature blocks or becomes blocked by a creature, that creature can't be regenerated this turn."
Viashino Weaponsmith74%
$0.15↓#313140.00↓27.9 years↓
"Whenever this creature becomes blocked by a creature, this creature gets +2/+2 until end of turn."
Spitting Slug73%
$0.31↓#316050.64↑32.1 years
"Whenever this creature blocks or becomes blocked, you may pay 
. If you do, this creature gains first strike until end of turn. Otherwise, each creature blocking or blocked by this creature gains first strike until end of turn."
. If you do, this creature gains first strike until end of turn. Otherwise, each creature blocking or blocked by this creature gains first strike until end of turn."
Raging Gorilla73%
$0.16↓#20060↑0.00↓29.6 years↓
"Whenever this creature blocks or becomes blocked, it gets +2/-2 until end of turn."
Dread Specter72%
$0.20↓#307120.55↑29.9 years↓
"Whenever this creature blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat."
Deathgazer72%
$0.07↓#267100.00↓26.9 years↓
"Whenever this creature blocks or becomes blocked by a nonblack creature, destroy that creature at end of combat."
Inferno Elemental72%
$0.11↓#291770.00↓17.1 years↓
"Whenever this creature blocks or becomes blocked by a creature, this creature deals 3 damage to that creature."
Ageless Sentinels71%
$0.29↓#266040.40↑23.3 years↓
"When this creature blocks, it becomes a Bird Giant, and it loses defender."
Ghost Hounds71%
$0.15↓#296830.00↓30.9 years↓
"Whenever this creature blocks or becomes blocked by a white creature, this creature gains first strike until end of turn."
Brimaz, King of Oreskos71%
$7.29↑#3035↑0.14↓12.6 years↓
"Whenever this card blocks a creature, create a 1/1 white Cat Soldier creature token with vigilance that's blocking that creature."
Mindbender Spores71%
$1.38↑#21945↑0.53↑29.9 years↓
"Whenever this creature blocks a creature, put four fungus counters on that creature. The creature gains "This creature doesn't untap during your untap step if it has a fungus counter on it" and "At the beginning of your upkeep, remove a fungus counter from this creature.""
Ashmouth Hound70%
$0.04↓#22732↑0.2414.9 years↓
"Whenever this creature blocks or becomes blocked by a creature, this creature deals 1 damage to that creature."
Ornery Goblin70%
$0.08↓#22058↑0.57↑7.9 years↓
"Whenever this creature blocks or becomes blocked by a creature, this creature deals 1 damage to that creature."
Skewer Slinger70%
$0.17↓#19742↑0.253.0 years↓
"Whenever this creature blocks or becomes blocked by a creature, this creature deals 1 damage to that creature."