{7}, {T}, Sacrifice Universal Solvent: Destroy target permanent.

Trample

Whenever Untethered Express attacks, put a +1/+1 counter on it.

Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)

Revolt — When Vengeful Rebel enters the battlefield, if a permanent you controlled left the battlefield this turn, target creature an opponent controls gets -3/-3 until end of turn.

{3}{G}: Put a +1/+1 counter on Verdant Automaton.

Walking Ballista enters the battlefield with X +1/+1 counters on it.

{4}: Put a +1/+1 counter on Walking Ballista.

Remove a +1/+1 counter from Walking Ballista: It deals 1 damage to any target.

{2}{U}: Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

{3}{R}: Welder Automaton deals 1 damage to each opponent.

At the beginning of combat on your turn, target artifact creature you control gets +2/+0 until end of turn.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you’re done activating mana abilities pays for {1}.)

Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.

If one or more counters would be put on an artifact or creature you control, that many plus one of each of those kinds of counters are put on that permanent instead.

If you would get one or more counters, you get that many plus one of each of those kinds of counters instead.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you’re done activating mana abilities pays for {1}.)

Flying

Gain control of target creature with power 4 or less until end of turn. Untap that creature. It gains haste until end of turn.

All creatures get -3/-3 until end of turn.

You may cast a spell with mana value 3 or less from your hand without paying its mana cost.

Haste

Whenever a creature an opponent controls dies, put a +1/+1 counter on Yahenni, Undying Partisan.

Sacrifice another creature: Yahenni gains indestructible until end of turn.