Breakthrough Skill across sets & languages(13)

• Battle Pack 2: War of the GiantsBP02-EN215$1.09
• Battle Pack 2: War of the GiantsBP02-EN215$1.44
• Battle Pack 3: Monster LeagueBP03-EN227—
• Battle Pack 3: Monster LeagueBP03-EN227$0.95
• Cosmo BlazerCBLZ-EN078—
• Cosmo BlazerCBLZ-EN078$19.42
• OTS Tournament Pack 30OP30-EN023$0.25
• Premium Gold: Infinite GoldPGL3-EN095$1.99
• Quarter Century StampedeRA04-EN202—
• Quarter Century StampedeRA04-EN202$5.95
• Structure Deck: Realm of LightSDLI-EN035$0.74
• Structure Deck: Realm of Light (2020 Date Reprint)SDLI-EN035$0.41
• Structure Deck: Rise of the True DragonsSR02-EN038$0.81

Same name, other languages or different rules text. Same-language reprints already sit in Printings above.