Nope. The Spear's got nothing. Well, except for the general multiplication factor, but it can't see what the kid could do with that, considering the state of his affinities. Still, it offers it up, tentative.

...Well. There's always the plant cantrips. That might work, with the multiplication factor to give it some oomph.

Decided, Robin reaches for his magic and slowly, carefully, threads a tendril of the plant-feeling magic into the Spear.

It doesn't take the Spear long to figure out what he's trying to do. Soon enough it reaches back, twining it's own, neutral magic around the plant-coloured tendril, boosting it, and then it (metaphorically) sits back and watches what the kid plans to do with it. 

As soon as the Spear boosts the tendril, Robin tenses up. That's... That's a lot more magic than the Dagger gave him to play with, from what he remembers. This is going to be a lot harder than anticipated. 

Still, he's gotta get out of here somehow, and if the Spear won't let him use it to (inefficiently) hack his way out, he'd better get on with it. 

Carefully, more carefully than he's ever been in his life, he guides the tendril out of the Spear, and into the nearest plant. This done, he takes a deep breath, steadies his nerves, and breathes out the incantation, focussing intently on the effect he wants. 

The branches of the bush begin to bulge as the magic seeps into it. Then, with a chorus of snapping and cracking, the plant starts to grow, upwards and outwards, its branches thickening and leaves broadening. The earth around it ripples, a prelude to roots exploding out of the ground. In its frantic growth it strangles the other greenery around it; caught on the twisting roots they are uprooted and consumed. As it reaches truly enormous size it begins to stress the surrounding trees, causing them to list outwards, groaning. 

It takes several minutes for the spell to run its course. By the time it it done the bush certainly doesn't look like a bush anymore, instesd appearing to be a very tangled and branchy tree. At least the spell did what Robin wanted, alongside all the unexpected side-effects: just in front of where Robin was standing is a shady tunnel in the monstrous bush, just large enough for him to pass through without brushing the sides.

In front of where he was standing, yeah, since he definitely isn't standing there anymore. After the plants' tortured screams die down he peers out from behind the tree where he'd taken shelter and gapes at his creation, his eyes taking it in in disbelief. After a moment he glances down at the spear held loosely in his hand and sends his incredulity at it, receiving the equivalent of a smug cackle in response.

Scowling, hw steps out of his hiding place and makes his way, tentatively, into the tunnel. Wary of being consumed himself he walks swiftly through to the other side, emerging into a well-lit clearing. He spies one of the less used forest paths across the grassy field and makes for it, relieved.

Half-way across, however, his path is blocked when one of the grass-covered heaps littering the field gives out a groan and begins to shift, revealing itself to be a knoll, one of the monsters common in these parts. It rises to its feet and grumbles in Robin's direction, lumbering towards him much faster than it seems it should be able to.

With a squawk, Robin jumps back, lifting the Spear to defend himself. He'll have to use magic to deal with it; knolls are made of earth and grass, not really something that can be stabbed into submission. 

He channels a smaller thread of wind magic into the it, twisting it into one of the more common forms and sending a blade of air to slice towards the knoll, sending grass flying everywhere. 

The knoll, its earthy form revealed without the grass to cover it, roars in pain as the wind scythe tears a deep gash into its torso. Choosing discretion over valour, it retreats from him, disappearing into the surrounding woods. 

Scowling after it, Robin cautiously continues in his previous path, gripping the Spear tightly and keeping an eye out for any further monsters.

Eventually he comes out onto the main paths and begins making his way back to the village, his excitement growing the closer he gets. There's no way they can stop him from joining the army now! Anyone wielding a Complex Artefact like this one is automatically recruited as soon as the Emperor finds out about them. It's only a matter of time before one of his lieutenants comes to find him. 

He can make out some kind of distubance coming from the town square as he enters Hanslea. The sound of crashing and shouting and the crackling of lightning magic becomes louder the closer he gets. There's a pair of horses in Imperial tack idling in front of the inn at the edge of town, a stableboy holding their reins and peering anxiously in that direction. 

Concerned, Robin picks up his pace, heading towards the square instead of the Kelins' house, waving to the stableboy, Embry, as he passes.

Embry calls after him, "It's a coupla mages, Rob, I think one of 'em has an Artefact, too. There's a squada the army takin' care of it though."

"Thanks, Bree, I'm just gonna watch," Robin calls back.