Gave the succubus theme a good run through. Is it normal for Zekari to keep her attack boosts between games? Also noticed the Apocalypse card being able to take out Valeria right at the beginning of the match. Valeria starting at 100 health to enable blitzing and the fact her notorious regen ability is able to apply to the player now normal?
The (de)buff displays are a very good step in making the cards more accessible for understanding. It should be noted that the coven theme deck has an alarmingly large number of buffs that either fail to give a buff description or fail to generate a buff name in the list entirely.
The additional text box describing keywords in match is a nice touch. The activate keyword definition box is however poorly worded. It just simply says it can be activated again without mentioning a card of that name has be played before the effect can be activated again. Since the keyword boxes are so big you might as well tack on a note for the coven spellcost keyword it not only requires that much coven level but it will also reduce coven level by that amount. I personally think the (de)buffs could be stuffed into that keyword detail explaining list as well, but that's more of a wish.
Also in regards to deck editor the box in the lower left corner of the screen displaying card details isn't wide enough so it cuts off the text of the longer descriptions. Given the empty space at the bottom you could afford to widen that box so a player doesn't have to enter a match so see everything.
Also the submissive debuff seems to do nothing to the enemy despite the fact it should be stealing height. Also slime witch serena is only allowed to have 1 in deck building mode despite being epic and costing 10.