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
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Adding a counter to this, making it an isntant, and giving it the ability to grab Towns makes this one of the better lower rarity ramp effects we've seen in Limited for a long time
Whenever I see so many two-ofs, usually that's a sign to me that the deck builder couldn't quite make up his or her mind about which cards were strongest and what the deck wanted to do
Try to keep a few cheap defenders in your hand for after you play your commander and be sure not to throw them all out too early
Whaddya say