
Nesting Bot | Artifact Creature | Robot | Start your engines! (If you have no speed, it starts at 1. It increases once on each of your turns when an opponent loses life. Max speed is 4.)
When this creature dies, create a 1/1 colorless Servo artifact creature token.
Max speed — This creature gets +1/+0. | Racrufi

Greasewrench Goblin | Creature | Goblin Artificer | Exhaust — {2}{R}: Discard up to two cards, then draw that many cards. Put a +1/+1 counter on this creature. (Activate each exhaust ability only once.) | Alexandre Honoré

Marauding Mako | Creature | Shark Pirate | Whenever you discard one or more cards, put that many +1/+1 counters on this creature.
Cycling {2} ({2}, Discard this card: Draw a card.) | Alix Branwyn

Molt Tender | Creature | Insect Druid | {T}: Mill a card. (Put the top card of your library into your graveyard.)
{T}, Exile a card from your graveyard: Add one mana of any color. | Filip Burburan