The recently concluded Magic: the Gathering Grand Prix in Utrecht has got one deck archetype updated in its build. The deck is Mardu Vehicles and its new component is Walking Ballista, a card that has been doing combo with Winding Constrictor in the deck rival,

BG Aggro. Here below is a decklist piloted by Samuel Vuillot which won the GP event.

Maindeck
4 Thraben Inspector
4 Toolcraft Exemplar
4 Walking Ballista
4 Scrapheap Scrounger
2 Thalia, Heretic Cathar

4 Gideon, Ally of Zendikar
2 Chandra, Torch of Defiance

4 Fatal Push
4 Unlicensed Disintegration
4 Heart of Kiran

4 Concealed Courtyard
4 Inspiring Vantage
4 Aether Hub
4 Spire of Industry
2 Plains
2 Mountain
2 Swamp
1 Needle Spires
1 Foreboding Ruins

Sideboard
1 Authority of the Consuls
4 Release the Gremlins
3 Oath of Chandra
3 Oath of Liliana
2 Nahiri, the Harbinger
2 Ob Nixilis Reignited