Collision // Colossus I always like versatility and options when evaluating cards
(One preposterous example: a creature that cant be blocked as long as the spellcasting player is wearing denim.) See also: 'Magic: The Gathering Arena' Closed Beta Play Begins Now First came 1998s Unglued, then 2004s Unhinged
To play them through Escape, you'll have to pay their original cost and then exile three other cards from your graveyard
But if you need to Fork a spell later in the game that you play, or if you need to Clone a creature you control, you can pay some mana, sacrifice Mirrorpool, and get that key effect in
But it's great in a few places - midrange where you have lots of bodies with black pips that are mugging up the board
There are many sorcery speed discard spells in black, but minimal instant speed, so every effect that you can include in your deck like this will be a huge help