You prowess-buff your squad, of course, but that ability to either copy a spell or loot after combat gives a ton of flexibility and options for top-deck windfalls
Alligators Sword 64428736 15
Being new to the hobby Im sure theres a lot of cards Im simply unaware of and dont have a huge collection to date, so a small pool to select from but would say the FA Blastoise ex from the 20th Anniversary set is probably whats surprised me most from purchase expectations (bought mostly due to price) to how it looks in person
Because of this new synergy, I've relabeled archetypes featuring three or more copies of Unholy Annex as Golgari Demons, distinguishing them from Golgari Midrange versions without the card
"Red-Eyes Dark Dragoon" is particularly powerful, and is worth using even if it forces the inclusion of "Dark Magician" in the Deck, while "Meteor Black Comet Dragon" and "Red-Eyes Slash Dragon" are more flexible alternatives, requiring any Level 6 Dragon monster and any Warrior monster, respectively, as their second material