Its hard to say for sure, but since Greven loves Doom Whisperer, Greed, Phyrexian Colossus, and Treasonous Ogre, it seems entirely possible that we may be seeing a resurgence of kamikaze style decks
Thanks in part to the growing influence of Universes Beyond, Magic: The Gathering is getting more expensive than ever
Burst draw at cheap investment remains one of the better sources of draw, and something most decks need a few versions of to go alongside more piecemeal draw effects
Sac an enchantment to destroy a creature
Game Trade Magazine Look inside the magazine In the following video, you will see more what is discussed in the GTM issue about Lorcana
But it now looks like this is the new normal, as both the Final Fantasy Secret Lair and the Sonic Secret Lair have followed this pattern (for FF the rare bonuses were the evoke elementals)