Xander's eyes widen as Sven draws the magic triangle. It's not what he's precisely used to, but here, he doesn't have Elementals to command...he gets to cajole the element itself, but from everything he's learned? It should work.

"That's very helpful!" Then, he realizes what Sven ended on, and snickers.

"Sure, it sounds good to me! Doesn't hurt that I kind of end up being a bridge in this sort of thing anyway, mostly by virtue of being a nephilim." He'd done it before, after all--usually between other Earth magicians, but the theory was the same, he felt.

So he squats, laying his fingers just outside the charred corner nearest him, and closes his eyes, nodding his head just a little.

"You with me here, Cottonball?" he asks, quietly. He can feel the tiny claws tighten in his hair, and his familiar spread her wings. "That's right. Let me build the foundation..."

The golden energy that flows into the sigil and gives it dim light, by all rights, should feel just like earth to Sven. His world. It calls to mind Artepus, for Xander--his home. It even vaguely smells like nutmeg and cocoa, warm and comforting. He's still murmuring under his breath, but the language has changed, likely unfamiliar now. That's just a way to facilitate, it's his thoughts that are directing his part of the spell now.