Monsoon 
Enchantment
$0.95 #27421 0.62 31.4 years
At the beginning of each player's end step, tap all untapped Islands that player controls and this enchantment deals X damage to the player, where X is the number of Islands tapped this way.
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Typhoon87%
$19.47↑#301030.21↓32.4 years↑
"this card deals damage to each opponent equal to the number of Islands that player controls."
Scald82%
$0.29↓#257311.12↑28.0 years↓
"Whenever a player taps an Island for mana, this enchantment deals 1 damage to that player."
Power Surge78%
$1.09↑#11693↑0.17↓33.2 years↑
"At the beginning of each player's upkeep, this enchantment deals X damage to that player, where X is the number of untapped lands they controlled at the beginning of this turn."
Curse of Marit Lage76%
$2.66↑#258381.32↑31.4 years
"When this enchantment enters, tap all Islands."
Citadel of Pain76%
$3.67↑#6850↑0.6126.4 years↓
"At the beginning of each player's end step, this enchantment deals X damage to that player, where X is the number of untapped lands they control."
Karma75%
$0.18↓#19292↑0.75↑33.2 years↑
"At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of Swamps they control."
Water Wurm74%
$0.23↓#315740.00↓32.2 years
"This creature gets +0/+1 as long as an opponent controls an Island."
Wu Admiral74%
$2.39↑#313470.25↓27.5 years↓
"This creature gets +1/+1 as long as an opponent controls an Island."
Thoughtleech72%
$0.22↓#250830.36↓31.4 years
"Whenever an Island an opponent controls becomes tapped, you may gain 1 life."
Carpet of Flowers72%
$1.75↑#1335↑0.5228.0 years↓
"At the beginning of each of your main phases, if you haven't added mana with this ability this turn, you may add X mana of any one color, where X is the number of Islands target opponent controls."
Angel's Trumpet71%
$0.56↓#8695↑0.78↑27.7 years↓
"At the beginning of each player's end step, tap all untapped creatures that player controls that didn't attack this turn. This artifact deals damage to the player equal to the number of creatures tapped this way."
Cold Snap71%
$0.19↓#315710.21↓31.4 years
"At the beginning of each player's upkeep, this enchantment deals damage to that player equal to the number of snow lands they control."
Mask of Intolerance70%
$0.30↓#304790.31↓25.4 years↓
"At the beginning of each player's upkeep, if there are four or more basic land types among lands that player controls, this artifact deals 3 damage to that player."
Boil70%
$0.64↓#15053↑1.89↑29.0 years↓
"Destroy all Islands."
Boiling Seas70%
$4.95↑#20408↑1.92↑29.5 years↓
"Destroy all Islands."
Tsunami70%
$0.35↓#19248↑2.00↑33.2 years↑
"Destroy all Islands."