mtg reveal cards from the top Heirloom Blade - Artifact - Treasure Hunt Price & Card

This means you should expect new UB cards to enter the Standard rotation, and be playable in Modern, Commander, etc

It's for new cards from the Core Set, not great reprints

If you are all Rampant Growth and Wall of Roots then Jitte isn't great at all but if it all Lotus Cobra and Llanowar Elf then Jitte is pretty solid

Like most Ninjas from that set, Mistblade is extremely dependent on ninjutsu and outside support to enable its trigger

One of the best things about Vehicle decks is that the usual utility creatures become pilots, so there's a lot of space to play around

You can even mix and match different printings so long as the total number of copies you've collected across all printings meets or exceeds the number you want to use in your deck