Scrolls craft mid-to-high equipment in Forge/Wonder; not sold in Store or Alliance Shop. General's Scroll Chest (free): lucky drop from Lv8 Peryton, Lv9 Minotaur, Royal Thief, Junior Cerberus; or Black Market 6,075 gems. King's Scroll Chest: from Lv10 Griffin, Lv11 Ifrit, Junior Cerberus; Black Market 18,230 gems; Battlefield Shop 360 badges / 1,140 crystals. Dragon Scroll Chest: from Lv12 Kamaitachi, Lv13 Fafnir, Lv14 Behemoth, Lv15 Phoenix, Viking Icebreaker, Medium/Senior Cerberus, Excellent Garuda; Event Pack Tier 5 (2 pcs); Black Market 54,000 gems; Battlefield Shop 1,160 badges / 3,420 crystals; Auction (event only). Achaemenidae Scroll Chest: from Fafnir, Behemoth, Phoenix, Viking Berserker/Chief, Medium/Senior Cerberus; Event Pack Tier 5; Auction only. Duty Officer Equipment Scrolls and Civilization Equipment Scrolls are event-only and heavily PAID. Civilization scrolls assemble from 30 fragments via Conquest (low-difficulty) or Supremacy (high) chests; the Wheel of Civilization is technically free but expected ~$300 (low)/$1,600 (high); Noble Coins from monster hunting (90/day cap), gathering (10/day) or packages. Astrolabe: pay-only. King's Party: Lv4 cake = 1 low scroll (~$200), Lv10 = 1 high scroll (~$2,000). For a bot, farm the free General's/King's/Dragon scroll chests from bosses/Vikings; treat Achaemenidae/Civilization scrolls as paid/end-game.
Original research source: Evony Guide Wiki