Its attack trigger exiles the top card of your library and lets you play it that turn, keeping the pressure and card advantage steady
What does Shadow Summoning do
The only restriction is that they have to be cheap, but given how early this is set up, I think that's likely to be the case
Shock lands Hurts so good Hallowed Fountain, Watery Grave, Blood Crypt, Stomping Ground, Temple Garden, Godless Shrine, Steam Vents, Overgrown Tomb, Sacred Foundry and Breeding Pool are all two-colour lands that come in tapped if you dont pay two life
When Magic players talk about booster boxes, the same few themes come up again and again
Gift of the Viper can help you trick an opponent in combat and keep the deathtouch keyword on a valuable creature going forward