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
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What enter the battlefield abilities did I miss
5 Magmatic Galleon Sailing For Treasure Being able to take advantage of excess noncombat damage is excellent, especially in red decks where most removal is damage-based
This means a big body like Danger