Sol'kanar the Swamp King 
Legendary Creature — Demon
$0.16 #19706 0.12 32.3 years
Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
Whenever a player casts a black spell, you gain 1 life.
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Demon's Horn100%
$0.23↑#6483↑0.00↓22.6 years↓
"Whenever a player casts a black spell, you may gain 1 life."
Throne of Bone97%
$0.17↑#24397↓0.75↑33.1 years
"Whenever a player casts a black spell, you may pay 
. If you do, you gain 1 life."
. If you do, you gain 1 life."
Bog Gnarr90%
$0.08↓#31756↓0.00↓25.3 years↓
"Whenever a player casts a black spell, this creature gets +2/+2 until end of turn."
Smolder Initiate85%
$0.16#28029↓0.33↑18.3 years↓
"Whenever a player casts a black spell, you may pay . If you do, target player loses 1 life."
. If you do, target player loses 1 life."
Krosan Constrictor83%
$0.12↓#30091↓0.25↑24.6 years↓
"Swampwalk"
Purraj of Urborg82%
$0.88↑#28511↓0.25↑29.9 years↓
"Whenever a player casts a black spell, you may pay . If you do, put a +1/+1 counter on Purraj."
. If you do, put a +1/+1 counter on Purraj."
Snake Pit80%
$0.32↑#13956↑0.0626.9 years↓
"Whenever an opponent casts a blue or black spell, you may create a 1/1 green Snake creature token."
Kor Firewalker80%
$0.18↑#24914↓0.29↑16.6 years↓
"Whenever a player casts a red spell, you may gain 1 life."
Freyalise's Charm79%
$0.19↑#29607↓0.00↓31.3 years↓
"Whenever an opponent casts a black spell, you may pay 
. If you do, you draw a card."
. If you do, you draw a card."
Dragon's Claw78%
$0.20↑#13985↑0.00↓22.6 years↓
"Whenever a player casts a red spell, you may gain 1 life."
Kraken's Eye78%
$0.10↓#15609↑0.25↑22.6 years↓
"Whenever a player casts a blue spell, you may gain 1 life."
Onyx Talisman78%
$0.34↑#25539↓0.0731.3 years↓
"Whenever a player casts a black spell, you may pay 
. If you do, untap target permanent."
. If you do, untap target permanent."
Iron Star77%
$0.15↓#27268↓0.33↑33.1 years
"Whenever a player casts a red spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Warmth76%
$1.06↑#28262↓0.0728.9 years↓
"Whenever an opponent casts a red spell, you gain 2 life."
Crystal Rod76%
$0.12↓#26717↓0.00↓33.1 years
"Whenever a player casts a blue spell, you may pay . If you do, you gain 1 life."
. If you do, you gain 1 life."
Wurm's Tooth76%
$0.13↓#14247↑0.36↑22.6 years↓
"Whenever a player casts a green spell, you may gain 1 life."
Angel's Feather76%
$0.19↑#10131↑0.00↓22.6 years↓
"Whenever a player casts a white spell, you may gain 1 life."
Radiant Essence76%
$0.21↑#31973↓0.28↑29.9 years↓
"This creature gets +1/+2 as long as an opponent controls a black permanent."
Valeron Outlander76%
$0.05↓#31084↓0.00↓17.6 years↓
"Protection from black"
Scalebane's Elite76%
$0.26↑#31940↓0.2029.6 years↓
"Protection from black"