Forerunner of the Heralds 
Creature — Merfolk Scout
$0.41 #9617 0.13 8.8 years
When this creature enters, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top.
Whenever another Merfolk you control enters, put a +1/+1 counter on this creature.
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Merrow Harbinger100%
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"When this creature enters, you may search your library for a Merfolk card, reveal it, then shuffle and put that card on top."
Deeproot Elite84%
$0.27↓#5970↑0.38↑8.8 years
"Whenever another Merfolk you control enters, put a +1/+1 counter on target Merfolk you control."
Jade Bearer79%
$0.08↓#22827↓0.25↑8.8 years
"When this creature enters, put a +1/+1 counter on another target Merfolk you control."
Seahunter79%
$3.78↑#11627↓0.0726.7 years↑
", 
: Search your library for a Merfolk permanent card, put it onto the battlefield, then shuffle."
, : Search your library for a Merfolk permanent card, put it onto the battlefield, then shuffle."
Jade Guardian78%
$0.23↓#25787↓0.079.1 years
"When this creature enters, put a +1/+1 counter on target Merfolk you control."
River Sneak78%
$0.24↓#13811↓0.00↓9.1 years
"Whenever another Merfolk you control enters, this creature gets +1/+1 until end of turn."
Wanderwine Hub76%
$0.82↑#13839↓0.0819.0 years↑
"As this land enters, you may reveal a Merfolk card from your hand. If you don't, this land enters tapped."
Vineshaper Mystic72%
$0.20↓#24098↓0.28↑9.1 years
"When this creature enters, put a +1/+1 counter on each of up to two target Merfolk you control."
Shaper Apprentice70%
$0.13↓#23747↓0.079.1 years
"This creature has flying as long as you control another Merfolk."