For transforming summons, you always play the front face up (Clive, in this example)
(10/5/2018) Players can cast spells and activate abilities after Niv-Mizzet's second triggered ability resolves but before the spell that caused it to trigger does
This method should work across all platforms, but if you're having trouble, the Lorcana Discord offers alternative methods for users on PC, Mac, and Android
As is the case with other collectible trading card games, scarcity is a factor in Lorcana
Team ChannelFireball broke the format at Pro Tour Paris with a little deck called Caw Blade
With single Collector Booster packs selling for $100, this Collector Booster sampler was a fun way to get a tiny taste of the action (like a drop of water in the desert, but still)