Quick-Play Spells: Quick-Play spells act in a very similar way to Normal spells in that, on a players turn, they can play these spells straight from the hand and have their effects take place immediately
As a three-mana creature, theres nothing super-exciting about Phyrexian Dragon Engine
While Underworld Breach has the downside of giving your cards Escape 3 (and causing you to blow up your graveyard in the meantime), it also has the incredibly relevant effect of not exiling the card that youre casting
This will kill with CCs like Blood Artist and Zulaport Cutthroat and then net you triggers with mono-Black CC fun times like Grave Pact
Elusen passes from player to player during each postcombat main phase, and whenever another player donates a permanent, the donating player draws a card, gains 1 life, and creates three Treasure tokens
If these didnt work at instant speed, they wouldnt be worth considering