I specifically like it because it offers an easy avenue to increase your speed: Since you can gain speed by making your opponents lose life, Blood Artist and its ilk get you there quickly
These two abilities actually work really well together, as the mana ability will give you the necessary resources to play the three cards you just exiled off the top of your library
In all seriousness, as much as it kills artifacts, Rambunctious Mutt is not great, but made for a similar blink target with let flexibility
Released in the spring, Ikoria: Lair of Behemoths introduced the ability for players to combine cards together to create monsters using the mutate keyword
Board builders & payoffs: Noosegraf Mob, Overseer of the Damned, Eternal Skylord, Gleaming Overseer, Vizier of the Scorpion, Army of the Damned