I have sourced much of this information from the esteemed collectors within the E4 community, from my personal accounts, and some information directly from two friends and former employees of WOTC and one WOTC printing company contractor
Without any evasion abilities, The Ancient One may struggle against any deck with chump blockers
In general, he is considered one of the hardest NPCs to defeat
(My Equinaut Deck is a deck based around Equilibrium and Fleetfoot Panther that plays and replays creatures with self-bounce triggers to abuse various triggers like Aura Shards, the bounce trigger, or tap them before they had back with Opposition, and so forth)
Basically, Build and Battle Boxes are intended for play at local leagues where you get everything you need to build and play a 40 card deck in a tournament setting
You can only use each effect of "Roxrose Dragon" once per turn