Tidea, Prophet of Swells

Islandwalk
Reveal the first card you draw each turn,
whenever you reveal a land card this way, add
{u} to your mana pool, this mana doesn't empty
as steps and phases end. Whenever you reveal a
nonland card this way, if it's converted mana cost
is less than the amount of mana in your mana
pool, draw a card.