Ryanviews on 1. Jun. 2017.
I played against a Discover Mage today.
They drew an extra two Frostbolts, three Fireballs, and a lot of Primordial Glyphs.
My poor Beast Hunter couldn't even hope to maintain a board presence from the massive amount of extra spells that went right into their hand through Discovers and flat out "Give Mage more spells". Once the Blizzard/Flamestrike combo went through after two Ice Barriers, there was no way.
I died after three fireballs to face when my board was killed.