you may play cards from exile mtg What's the benefit of exiling a Magic: The Gathering card your library? Top 30 Exile-Play Red Cards

He was able to gain 1 Loyalty and turn any creature into a 3/3 Elk

Sowing Mycospawn is Reap and Sow but an Eldrazi

Sylvan Library will let you brute force your way out of a bunch of dud draws

(If you're physically recoiling at the thought of all those warped and potentially bent cards, I'm right there with you) They run the gamut from Portal (1st) to Odyssy Block to Zendikar Block to M10 and M11, and who knows what else

A tip: keep your eyes peeled for any new expansions that might bring a wave of alternate frames

Thats crazy good with difficult-to-craft cards or cards that are cheap but have high craft mana requirements