Originally Posted by
Eldariel
You can replace Sea Drake, but the deck will be worse without it. You could try:
-Pestermite
-Weatherseed Faeries
-Juggernaut
-Phyrexian Warbeast
-Cloud Spirit
etc.
Basically, efficient 3-drops work, but since Sea Drake is the most efficient, the deck will suffer. Still, the combination of equipment, beaters, Chalices, Forces and speed will allow you to win regardless of Drakes - their size is helpful, but since it's only a 4-of in a deck without tutors, it's not in any way the only reason the deck wins.