Pretender's Claim 
Enchantment — Aura
$0.34 #28689 0.45 27.0 years
Enchant creature
Whenever enchanted creature becomes blocked, tap all lands defending player controls.
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Dwindle78%
$0.04↓#275020.00↓8.3 years↓
"When enchanted creature blocks, destroy it."
Ferocity75%
$0.19↓#243850.06↓27.0 years
"Whenever enchanted creature blocks or becomes blocked, you may put a +1/+1 counter on it."
Favor of the Woods74%
$0.20↓#256380.00↓14.7 years↓
"Whenever enchanted creature blocks, you gain 3 life."
+1 more matching line
Battle Strain74%
$0.31↓#21399↑0.31↓25.1 years↓
"Whenever a creature blocks, this enchantment deals 1 damage to that creature's controller."
Leery Fogbeast74%
$0.12↓#269850.00↓24.0 years↓
"Whenever this creature becomes blocked, prevent all combat damage that would be dealt this turn."
Contaminated Bond72%
$0.11↓#20001↑0.12↓23.0 years↓
"Whenever enchanted creature attacks or blocks, its controller loses 3 life."
+1 more matching line
Sinister Possession72%
$0.08↓#18637↑0.14↓13.5 years↓
"Whenever enchanted creature attacks or blocks, its controller loses 2 life."
Coils of the Medusa71%
$0.11↓#275990.11↓29.4 years↑
"Enchant creature"
Luminous Wake70%
$0.23↓#22343↑0.06↓16.5 years↓
"Whenever enchanted creature attacks or blocks, you gain 4 life."
Carnage Gladiator70%
$0.05↓#20512↑0.06↓13.5 years↓
"Whenever a creature blocks, that creature's controller loses 1 life."
Plague Wight70%
$0.08↓#285110.13↓7.7 years↓
"Whenever this creature becomes blocked, each creature blocking it gets -1/-1 until end of turn."