Rats are perfect for Vehicles because the major drawback of the latter is the constant need for creatures to tap and animate them into combat, on attack or defense
It gains first strike until end of turn
So, even if all you wanted to do was have a few of the Robin's Pal variants in your deck, they could all be played at the same time or one right after the other, making a wall of defense for your other characters
Like Modern Horizons releases preceding it, Modern Horizons 3 has returning cards from Magic 's history to join Modern
There are some awesome resources out there
Sheoldred, The Apocalypse Honestly, deathtouch on Sheoldred is hardly the big draw to this very expensive card, but it does mean the Sheoldred can menace people in combat almost as well as it menaces players outside of combat