PSA Don't copy Memory Deluge, it won't work.

I've seen two different streamers fall victim to this, so I'm sure casual players will too. [[Memory Deluge]] says "Look at the top X cards of your library, where X is the amount of mana spent to cast this spell." If you copy Memory Deluge, no mana was spent to cast the copy, so you look at the top 0 cards of your library, AKA do nothing.