So essentially it is a 6/7 flying Dragon after the first turn it is played
If you've ever seen me talk about Pauper, many of these will seem familiar to you, and that's because Flicker decks are a major part of that format
Plus its mana value is only 3, which is very low for all that it gives you
Evasive also makes Diablo difficult to challenge, so his weak lore Strength and Willpower aren't that disastrous
A 30-pack box gives 6 prize packs after each player receives 3 packs
She does have to attack to do her thing, but the fact she can remove lore counters from multiple Sagas at once is particularly potent, as it can allow you to repeat triggers on your Sagas, and if they happen to be Saga Creatures, she makes sure they stay on the battlefield to attack and block longer