![Urgent Synthesis [RGBT-EN057] Common](http://rayscollectibles.myshopify.com/cdn/shop/products/31900_200w_{width}x.jpg?v=1613158641)
![Urgent Synthesis [RGBT-EN057] Common](http://rayscollectibles.myshopify.com/cdn/shop/products/31900_200w_530x@2x.jpg?v=1613158641)
| Set: | Raging Battle |
| Card type: | Spell |
| Rarity: | Common |
Activate by returning 1 Iron Core of Koa'ki Meiru in your Graveyard to your Deck. Special Summon 1 Level 4 or lower Koa'ki Meiru monster from your hand or Graveyard.
| Set: | Raging Battle |
| Card type: | Spell |
| Rarity: | Common |