YuGiOh: Machina Armored Unit

Yu-Gi-Oh Card: Machina Armored Unit
Available from these partners:
Machina Armored Unit
Type:Continuous Spell
Text:Once per turn, when a Machine-Type monster is destroyed by battle and sent to your Graveyard, you can Special Summon 1 Machine-Type monster with lower ATK and the same Attribute from your Deck.
Printings: Astral Pack 2 (AP02-EN022)
Cyber Dragon Revolution Structure Deck (SDCR-EN028)
Legendary Dragon Decks: Cyber Dragons! (LEDD-ENB19)
Machina Mayhem Structure Deck (SDMM-EN021)
Mechanized Madness Structure Deck (SR10-EN025)