For the 3rd effect, are they all Islands in addition to their original thing or are they overridden to being only Islands?

They are overridden. That's in fact the point. It's Blood Moon for islands.

Very cool

Thank you^^

So the only way to deal with this if it enters play is to somehow throw an exile enchantment on it or one of those weird "Creatures lose all abilities" effects...but that player is running blue so it'd probably get countered anyway. Basically this card just wins the game outright unless you're also playing blue, but they'll still have a hard time because their lands won't untap on their next untap step.

I don't play infect and haven't played modern in quite some time, but I think an infect deck would win before the opponent could cast this.

I agree with this sentiment, this card is litterally half blood moon, half vorinclex, in mono-blue... At a CMC of 5 which is way low of a curve on just one of those abilities. Not to mention the amount of evasion it has with indestructible and counter-prevention. If this was a commander, dear lord help that table. It is a hard counter to pretty much any non-mono color deck in any format. Heres to holding up a white mana in response for the 100% swords/path response because thats your only way out of this card.