When these creatures do combat damage, they also provide you with card draw
Does your deck need to jump ahead on mana in order to function properly and attempt to do what you want it to do
This is one of the few efficient and powerful creatures blue gets, though its significantly weaker in formats without access to excellent top deck manipulation like Ponder and Brainstorm
5 Depala, Pilot Exemplar The Original Vehicle Commander Depala, Pilot Exemplar gives a stat boost to all your Dwarves and Vehicles, the former of which can support Vehicles greatly
A lot of that is probably do to both the limited amount of Conspiracy packs cracked compared to the near-infinite amount of Pacifism copies opened over the years, but of the three options shown in the images above this one is probably the clearest upgrade the most often
You can only really play this in the most grind win orientated decks but it is an incredibly card economical way of beating and archetype