Crucible of War is the third booster set for Flesh and Blood, also being the first supplementary booster set. It released on August 28th, 2020 in local game stores across the USA, Australia, New Zealand, Taiwan, and Malaysia.

"Alpha Rampage" is a trading card from the "Welcome to Rathe" set of the trading card game, Flesh & Blood.

"Beacon of Victory" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Steelblade Supremacy" is a trading card from the "Welcome to Rathe" set of the trading card game, Flesh & Blood.

"Red in the Ledger" is a trading card from the "Arcane Rising" set of the trading card game, Flesh & Blood.

"Convulsions from the Bellows of Hell" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Phantasmaclasm" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Mugenshi: RELEASE" is a trading card from the "Welcome to Rathe" set of the trading card game, Flesh & Blood.

"Deep Rooted Evil" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Exude Confidence" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Tear Limb from Limb" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Nourishing Emptiness" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Shadow of Ursur" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Plow Through" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Rally the Rearguard" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Seeping Shadows" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

"Endless Arrow" is a trading card from the "Arcane Rising" set of the trading card game, Flesh & Blood.

"Pursuit of Knowledge" is a trading card from the "Arcane Rising" set of the trading card game, Flesh & Blood.

"Induction Chamber" is a trading card from the "Arcane Rising" set of the trading card game, Flesh & Blood.

"Last Ditch Effort" is a trading card from the "Welcome to Rathe" set of the trading card game, Flesh & Blood.

"Tome of Torment" is a trading card from the "Monarch" set of the trading card game, Flesh & Blood.

There is a darkness spreading across the land. As grotesque creatures rise from the shadows, a long-forgotten power reemerges, with dark machinations that threaten to upset the delicate balance of this world.