Al'goan, Sea Voispring

Hexproof, Ward {3}
{t} add {4} {w} mana
When Al'goan enters the battlefield, summon {x} 2/2 white construct tokens with Haste and "{t} to add {w} mana"
At the beginning of your end phase mill {3} cards
from a chosen library, you may choose to add
that card to the battlefield "tapped",
if the card chosen is a creature card it becomes a
Land Creature.