You can only use each effect of "Eria the Water Channeler" once per turn
We cant help but feel rather hopeful for other crossovers that are in the works, and the hope this will bring players from both universes together.
If you don't cast the nonland card you reveal, or if you don't reveal any nonland cards with lesser converted mana cost, you can still put a land card onto the battlefield before you finish cascading
Cards with trample over planeswalkers can attack planeswalkers, and if their power is greater than that planeswalker's loyalty, they can destroy the planeswalker and deal excess damage to that planeswalker's controller
The only exception is if one of your cards is damaged during a tournament, only for the duration of that event, and only if issued by a judge
Tidus and the FFX Deck Tidus is a green, white and blue card with abilities that simulate the Sphere Grid by allowing you to place a counter on a creature you control