Anime Last Stands Update 66 lands as a Fullmetal Alchemist Brotherhood crossover and pushes a big content mix for collectors and end-game runners. The update adds new units with evolutions, a high-pressure Siege mode, a limited Alchemy Trials event, a fresh tournament season, and new drops across Story and Legend stages.
What is Anime Last Stands Update 66?
Anime Last Stands Update 66 released on 22 August 2025 with a Fullmetal Alchemist theme and a focus on roster growth plus challenge content. Across the board, you get new Story and Legend stages that deliver unit drops, evolution materials, and special items to strengthen your team.
On the unit side, there are eleven additions in total: five new units that evolve, one special evolution unit, one gamemode unit with an evolution path, and three limited units that also evolve. The variety means you can chase power either through standard progression or time-limited banners.
New Units and Evolutions
The headliners are the five new evolvable units, built to scale with your materials from the latest stages. Alongside them sits a unique evolution unit, which offers a focused upgrade route, and a gamemode-exclusive unit tied to the update’s new activity with its own evolution. Rounding out the list are three limited units with evolutions, giving collectors a reason to engage early before they rotate out.
If you are targeting evolutions, route through the new Story and Legend stages first. Their drops cover what you need for the upgrade steps and help you test each unit’s role before committing resources.
Siege Mode Explained
Siege is the new gamemode with two difficulties: Normal and Bounded. Farming is disabled here, but kill income is significantly increased to keep builds moving as waves escalate. Element and subtype interactions matter more than usual, thanks to a system of buffs and debuffs that shape which squads overperform on a given run.
Clear Normal and you can obtain an Alchemy Key, which unlocks Bounded Mode. Bounded hits harder but offers better rewards, so the optimal path is to secure your Normal clear, claim the key, then push Bounded once your comps respect the buff and debuff rules.
Alchemy Trials Event
Alchemy Trials is a limited-time event where cash is replaced by Alchemy Energy. You spend this energy to roll the new units and to upgrade, creating a self-contained loop: play event content, stockpile Alchemy Energy, convert that into roster progress. The event brings three limited units, a new boss mechanic, an event shop, and an exclusive currency to chase.
Because the economy shifts inside Trials, plan your sessions around energy conversion rather than standard farming. Prioritize encounters that feed the shop and banner goals you care about most.
Tournament Season and Update Bounties
A new tournament season starts with Kinshero as the featured unit and a dedicated Babylonia Castle map. This is a clean way to test comps shaped by Siege buffs or event pulls under competitive pressure. In parallel, Update Bounties add fresh quests with extra rewards, giving you a reliable source of materials while you ladder and experiment.
How to Progress Efficiently in Update 66
Secure Story/Legend drops first to stock evolution materials and try new kits at low risk.
Clear Siege Normal for the Alchemy Key, then step into Bounded once you have a lineup that benefits from the element and subtype buffs.
Focus your Alchemy Energy in Trials on either rolling new units or pushing key upgrades, not both at once.
Track official channels for potential redeem codes. None are announced yet for this update, but large patches often ship codes for gems, tickets, or core resources.
Final Thoughts
Anime Last Stands Update 66 blends roster depth with high-value activities. Between the Fullmetal Alchemist units and evolutions, Siege’s Normal and Bounded paths, the Alchemy Trials event loop, and a fresh tournament season, you have clear routes to power. Start with Story and Legend for materials, unlock Bounded via Siege, then cycle Trials to convert Alchemy Energy into real upgrades across your team.