My first instinct is that Emrakul, the Promised End seems a little too slow for most decks in Modern and is not going to be worth it to focus on making it cost less
This can only be activated if Hearthhull's threshold for the new Edge of Eternities Station mechanic is hit, first with two or more charge counters and then with 8 or more for the second part of the card
This is probably my favorite card in the set, and I love how much nonsense it's set up to let you pull off
Some cards in other sets refer to a card, spell, or permanent that "has an Adventure." This refers to a card, spell, or permanent that has an adventurer card's set of alternative characteristics, even if they're not being used and even if that card was never cast as an Adventure
As usual, this is pretty efficient and flexible, so it's good removal
It untaps a creature, meaning you get to block with it