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As a reminder, this format has infinite mana, but you can only cast one spell per turn

Boon: MTG Arena Boon is a digital-only mechanic that gives the next spell you cast a boon when the mechanic's requirement is met

It's only ever been released as one of the Mythic themes for Jumpstart 2022, found in 1/121 of packs, so there are relatively few copies floating around

If that mana is spent on a creature spell, it gains haste until end of turn

During the second week of Scars previews, I talked about the creation of metalcraft so I thought I'd use today's column to step back and look not at metalcraft specifically but at the larger group of mechanics that metalcraft is a part ofsomething we refer to in R&D as threshold mechanics