After this the drill is as normal: assignt-deal damage-SBA-triggers-priority
The real power of this card is in the big old chunk of text though, which reads, Whenever Scourge of Valkas or another Dragon enters the battlefield under your control, it deals X damage to any target, where X is the number of Dragons you control. This basically means that if youve got one Dragon, you can deal one damage to something, two Dragons is two damage and so on
Featuring Chick the Yellow and Call of the Haunted, the deck had within it an infinite combo which hasn't seen the light of day in years
Cut some of the top end in favor of effects like Don Andres, the Renegade, and Tasha, the Witch Queen to make use of that angle
These were distributed through exclusive event-based channels, making them particularly unique and desirable for dedicated collectors of Japanese promos
You could also use this as a way to swarm the field or to have tribute fodder