To temper all this discussion, Vehicles arent the end-all, universal answer to the format
"Entermate" is a portmanteau of entame (a Japanese shorthand for "entertainment") and "mate"
[24] Giant Soldier of Stone brings up fond memories for fans of the Yu-Gi-Oh anime, specifically that one battle where Yugi faced off against Mako Tsunamiand Yugi used the Giant Soldier of Stone to smash the moon (as in, a summoned moon from a previous play)
The Maze doesn't take any mana to use, nor is in a color identity, but the Haven taps for mana so I consider them roughly equal
Original (Outdated): One extra cool thing about Stick to the Plan that nobody else seems to be mentioning here: For Roland Banks, Zoey Samaras and Carolyn Fern - you can include one copy of Astounding Revelation in your deck
Take that for what its worth!