Tengu format ruling
Iron Chain Repairman

Card effect (current official text)When this card destroys a monster by battle and sends it to the Graveyard, inflict 300 damage to your opponent. Once per turn, you can Special Summon 1 Level 4 or lower "Iron Chain" monster from your Graveyard, except "Iron Chain Repairman". This card cannot attack the turn you activate this effect.
Rulings
- Iron Chain Repairman's second effect targets 1 Level 4 or lower Iron Chain monster in your GY.
- If Iron Chain Repairman attacks and its attack is negated, it cannot activate its second effect in Main Phase 2.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.