its indeed spellbook is one copy per turn but not at star hall, starhall is +counter (if you suggesting citadel), +atk, and +add, just destroy it with MST or heavy storm when it has counter (3 is enough) then add exodia with this eff, 3 star hall is +3 i think, first i used citadel, but when i used it, library only can use citadel's counter once per turn even citadel has more than 3 counters after first use(maybe bug, and i've deleted my replay, i'll test it again and post the replay if i has same problem again), so i changed with tower, i'll test what your suggest tho, coz i want improvement (fastest now is 4 turn exo), so why not
The most notable piece of feedback we got was that we were a bit too heavy on retro frame cards that weren't especially playable in Limited and a bit light on combat tricks
A clan of skyfaring demihumans who always have each other's backs
(If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.) Once a creature becomes monstrous, it can't become monstrous again
For some, its the dream
How many Pack Points does it cost to craft Alolan Geodude