Dark Engage - Once during your turn (before your attack), you may use this power
Doing everything from managing Equip Spells, to FLIP effects, to caring about duplicate copies, nobody expected them to truly work as a cohesive strategy
While time and time management are main factors in this deck, time itself was not particularly nice to the overall strategy
That said, I personally think Elsha, Threefold Master is inferior to Monastery Mentor, and that card is seeing little to no play despite being Standard legal
The former is a 6/6 with trample, on curve, and when it dies
If youre someone who loves to collect every rarity of a specific card or just like to max out the rarity of your deck, then these are usually the cards you want to be hunting for