1 foil promo card
Grandfathers old collection, the whole are any of these worth something routine we hear probably twice a week
Once you have a sense for how the deck plays, consider experimenting by getting two more of the same one
The first is that Threat doesnt work with Rhythm of the Wild, which is something Id be looking to prioritize in a four-mana threat, and the second is that Collision is also fantastic and offers an alternative card for Gruul decks to play that can answer Lyra Dawnbringer, Niv-Mizzet, Parun, Doom Whisperer, or any other huge flier you might be looking for a removal spell for while doubling as a proactive card and even an answer to planeswalkers
Key chase cards include Latias Ex #87, Alolan Exeggutor #89, Archaludon Ex #88, Alolan Exeggutor Ex #92, Latias Ex #78, Flygon Ex #79
With Vial Smasher, whenever you cast your first spell each turn, a random opponent gets some damage to the face