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. : Scourge of Valkas gets +1/+0 until end of turn.
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.
17-11-2017
wotc
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.
Random a card of Magic: The Gathering (MTG), but you can also roll the D20 dice, random a Planeswalker, have fun with the random rules and more.