Positron Bolt
From Archon Arcana - The KeyForge Wiki
Positron Bolt • Logos • Action • Uncommon • Play: Deal 3
to a flank creature. Deal 2
to its neighbor. Deal 1
to the second creature’s other neighbor. • Artist: Pedro Dutra • Card Number: CotA (118), WC (156), MM (094)



FFG Rulings
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Positron Bolt will deal 3 damage to that creature. You will choose one of that creature’s neighbors to deal 2 damage to, and then deal 1 damage to the other neighbor of that second creature.Source: Rulebook
What happens if I use Spectral Tunneler on a non-flank creature (causing it to be considered a flank creature), then play Positron Bolt on that creature?
Positron Bolt will deal 3 damage to that creature. You will choose one of that creature’s neighbors to deal 2 damage to, and then deal 1 damage to the other neighbor of that second creature.
Source: Rulebook
Commentary
While there are three separate sentences to the ability of Positron Bolt, all damage is dealt simultaneously, not sequentially.
Source
