Staying himself from charging for the wagon immediately, Teryl instead takes a moment to make some odd motions and speak some arcane words. This action culminates in him touching Brian, a flash of power passing from Teryl's hand to Brian, and Brian suddenly blurring at the edges. That should help the lack of armor, he says.
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Round 1 before Mafalma gets there, cast Blur on Brian as Standard Action, then spend a move action to head towards the wagon. Round two and three, full round run action. By then, the goblins should be aware of him, so he might charge in, or not, depending on what they're doing at that point.
Certain actions relegated to after gate opens.