Forge simulator
A working copy of the anvil. Put relics on the shelf, take a sword and strike it: the odds, the relic procs, Frenzy and the sounds all follow the game's own code.
Forge it a thousand times
Takes the sword set up on the right and strikes it until it reaches the target or breaks, over and over, with your shelf and with an empty one. Frenzy strikes are counted at the hammer's top speed, so the result is the best case for a fast clicker.
How close is it to the game
The odds, the value of the blade and every relic effect come from a line-by-line port of the game's forge code. We check that port by running the game's own code side by side with it: thousands of random relic shelves and sword states, struck with the same tickets and dice, with every number compared after every strike. They agree on all of them.
Timing works the way it does at the anvil. The hammer needs 0.64 seconds between strikes, divided by your speed relics, and Frenzy lasts 4 seconds of real time, so how many strikes you fit into it is up to you. The strike, the success chime and the Great phrase are rebuilt from the formulas the game uses to make them; the rest are the game's recordings.
Two things are simplified. A Seal of Twins copy is counted rather than put on the floor, and the run-wide counters (Grudge Nail tickets, Broken Holy Sword inheritance, Ossuary tickets) carry over between the swords you take here as they would within one day. For the odds on their own, use the odds calculator.