If an effect instructs a player to meld cards that cant be melded, those cards remain in exile
For those of you who dont know, milling means putting a card from the library straight to the graveyard
If evidence was collected and an opponent has multiple creatures tied for the greatest power, that player chooses which one to sacrifice
Emrakul, the Promised End + Ulamog, the Ceaseless Hunger Eldrazi are, by nature, annihilating world enders, which is a spooky premise itself
When you quest with a character that has the Support keyword, you can add that Support characters strength to any character you choose other than the Support character
It wouldnt hurt if you wanted to play this as a one-off spellcasting payoff, but its not that impactful of a choice either