The competition involved participants who played shield battles (forming a deck from unopened expansion packs for competition) using 10 packs of the Legendary Heartbeat expansion, released back in July
Shroud is a bit of a double-edged sword, however, as you can no longer target your own artifacts with spells or abilities either, but more often than not the trade-off is well worth it
Control and spellslinger strategies love how it allows one key turn to rewrite the entire board state
Hunt the Weak, first printed in Magic 2014 , last seen in Dragons of Tarkir
Say hello to the new Craterhoof Behemoth
Command Tower is the classic example: Its colorless from a deckbuilding standpoint because it doesnt have colored mana symbols printed on it, but it still fixes you perfectly in-game because it only makes colors your commander actually has