Samut takes full advantage of this, granting other creatures the player controls +X/+0, where X is their current speed, as well as making non-creature spells cost X less to cast, where X is their current speed
Sensational Spider-Man Sensational Spider-Man is already cool as a 3/3 that taps creatures with a stun counter
The card will also be fine in casual Commander decks where its three mana cost isnt too restrictive, and could have further versatility in strategies that can reliably pay both costs for the card, like Jodah, the Unifier
Magic Amonkhet card list & price guide
There's plenty of ways to get lots of artifacts out and pump this guy, but this is like the same as another card in this set, basically 2/2 for 3 with an ability that gives it counters and basic evasion, which is pretty same-y
Can I put an Aura on an opponents creature