Special Addition: Mystic Sanctuary Technically not a blue card, Mystic Sanctuary is a great land that can produce blue mana and has a great ETB effect
Tapping into the four elements Earth, Fire, Water, and Air these Avatars summon mythical minions, conjure ancient relics and cast a myriad of powerful spells to disrupt, confound, and ultimately destroy their opponent
Might not happen, but we even had those two Shrouded Fable collections include 2 very nice SIR promos last year, so it's not impossible
World Breaker World Breaker is exactly what I would expect from an green eldrazi
The math folks could probably shed some better light on why this is good
Save the GX attack for late-game when your opponent least expects the burst damage