Deeproot Waters 

Enchantment
$0.26 #4413 0.30 9.1 years
Whenever you cast a Merfolk spell, create a 1/1 blue Merfolk creature token with hexproof. (A creature with hexproof can't be the target of spells or abilities your opponents control.)
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Deeproot Pilgrimage90%
$1.82↑#45230.262.9 years↓
"Whenever one or more nontoken Merfolk you control become tapped, create a 1/1 blue Merfolk creature token with hexproof."
Emperor Mihail II89%
$0.35↑#42500.09↓4.1 years↓
"Whenever you cast a Merfolk spell, you may pay
. If you do, create a 1/1 blue Merfolk creature token."
Swift Warden80%
$0.17↓#21317↓0.05↓8.8 years
"When this creature enters, target Merfolk you control gains hexproof until end of turn."
Wanderwine Hub80%
$0.82↑#13839↓0.08↓19.0 years↑
"As this land enters, you may reveal a Merfolk card from your hand. If you don't, this land enters tapped."
Deeproot Elite79%
$0.27↑#5970↓0.388.8 years
"Whenever another Merfolk you control enters, put a +1/+1 counter on target Merfolk you control."
Shaper Apprentice78%
$0.13↓#23747↓0.07↓9.1 years
"This creature has flying as long as you control another Merfolk."
Jade Bearer77%
$0.08↓#22827↓0.258.8 years
"When this creature enters, put a +1/+1 counter on another target Merfolk you control."
River Sneak76%
$0.24↓#13811↓0.00↓9.1 years
"Whenever another Merfolk you control enters, this creature gets +1/+1 until end of turn."
Silvergill Adept74%
$0.29↑#12893↓0.12↓19.0 years↑
"As an additional cost to cast this spell, reveal a Merfolk card from your hand or pay
."
Judge of Currents74%
$0.30↑#18841↓0.2919.0 years↑
"Whenever a Merfolk you control becomes tapped, you may gain 1 life."
Jade Guardian74%
$0.23↓#25787↓0.07↓9.1 years
"When this creature enters, put a +1/+1 counter on target Merfolk you control."
Lys Alana Huntmaster74%
$0.97↑#2322↑0.2819.0 years↑
"Whenever you cast an Elf spell, you may create a 1/1 green Elf Warrior creature token."
Merrow Commerce74%
$13.13↑#6683↓0.3919.0 years↑
"At the beginning of your end step, untap all Merfolk you control."
Kumena's Speaker72%
$0.21↓#22357↓0.00↓9.1 years
"This creature gets +1/+1 as long as you control another Merfolk or an Island."
Singer of Swift Rivers72%
$0.27↑#6148↓0.17↓2.9 years↓
"You may cast Merfolk spells as though they had flash."
Tributary Vaulter72%
$0.11↓#23642↓0.02↓0.7 years↓
"Whenever this creature becomes tapped, another target Merfolk you control gets +2/+0 until end of turn."
Sygg's Command71%
$0.22↓#16296↓0.08↓0.7 years↓
"• Create a token that's a copy of target Merfolk you control."
Deepchannel Duelist70%
$0.23↓#16989↓0.14↓0.7 years↓
"At the beginning of your end step, untap target Merfolk you control."