It's a great counter to any card that might win the game, and can help you win the game against something like a Thassa's Oracle combo since that user won't have a card to draw when their turn comes back around
Sheoldred, the Apocalypse Listen, I know what youre going to say
There are a few hundred folks playing this in their Prosper, Tome-Bound decks, which goes to show that folks dont really understand how these types of cards work
Abhorrent Oculus A 5/5 flier for only 3 mana sounds too good to be truebut Abhorrent Oculus makes it real by requiring you to exile six cards from your graveyard
The flame was hitting the Aven to demonstrate that it was immune to it (as it had protection from red), but too many people were reading it as if the Aven was harmed, so we decided to move it to a red direct-damage spell
Planeswalkers also more frequently had game-winning abilities, like Karn Liberated's ability to restart the game but giving you powerful tools to work with while your opponent is rebuilding from scratch