This card could be beneficial in a red deck that focuses on land destruction as a strategy, as it provides a repeatable way to destroy opponent's lands
And finally, some cards do care about the creature type villain, and this is a low-cost villain for such decks
Doing so causes the reflexive triggered ability to trigger
If you can give flash to a creature with dash then you can cast it at instant speed, but otherwise you have to abide by the same rules for when the dash creature can be cast
Do you have to dedicate yourself to an aura-matters deck for them to be effective
The mana curve of an Eshki Temur Roar deck is rather high, so cards like Gwenna, Eyes of Gaea and Selvala, Heart of the Wilds are especially strong since they'll enable you to generate more mana than they cost to cast