Flying Whenever Scourge of Valkas or another Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control. {R}: Scourge of Valkas gets +1/+0 until end of turn.
2017-11-17
If a Dragon entering the battlefield causes Scourge of Valkas's ability to trigger but leaves the battlefield before that ability resolves, that Dragon still deals damage.
2017-11-17
The amount of damage dealt by the Dragon that entered the battlefield is based on the number of Dragons you control when the ability resolves.