Target 1 Thunder monster in your GY; Special Summon it, then you can Special Summon as many monsters with that same name as possible from your GY. The monster(s) Special Summoned by this effect are banished when they leave the field, also while they are face-up on the field, you cannot Special Summon monsters, except Thunder monsters. You can only activate 1 "Thunder Dragons' Hundred Thunders" per turn.
Revived monsters are banished when they leave the field.
Restricts your Special Summons.
Thunder Dragons’ playstyle revolves around discarding and banishing their monsters to trigger their effects, so getting banished is a plus for them. Thunder Dragon monsters that can search copies of themselves are the most suited for this card.