Turn-1 accelerants are busted, especially when you have them in your opening hand
Earthcraft has long been banned out of basically everything, including Legacy, thanks to interactions like: Turn 1: Wild Growth Turn 2: Earthcraft, then drop Shrieking Drake and respond to its trigger by tapping it to untap the land with Wild Growth on it
Blind Obedience Blind Obedience is a prison piece that will slow down your opponents' creatures and mana rocks, disable haste creatures, and will give you extort triggers to bleed everyone down while you benefit from the lifegain
(Scryfall note, 2017-04-17) Vial Smasher's triggered ability triggers when you cast your first spell each turn, regardless of whose turn it is
Effects that reduce the cost of spells are very powerful and should always be considered closely
Thoughtlace), the "Wards" (Black Ward, Blue Ward, Green Ward, Red Ward, % 26amp