Narrow Tunnel

Card type	Monster
Attribute	TRAP"TRAP" is not in the list (DARK, DIVINE, EARTH, FIRE, LIGHT, WATER, WIND, ?, ???, THUNDER, ...) of allowed values for the "Attribute" property.
Each player can only Summon 1 monster to their side of the field per turn. If a player controls 2 or more monsters, they must destroy monsters they control until they only control 1.

Yugipedia β