msem-instigator

Audition for green, then audition for green. (Create a 1/1 Construct Actor creature token, a Scout Role giving 2/3 and vigilance, or a Warrior Role giving 3/2 and trample. Roles replace older ones.)

Advance {2} (Cast this for {2} to advance it as it enters. {2}: Advance this as a sorcery.)
Equipped creature gets +X/+0 and has flying, where X is the number of times it and Jet Pack have advanced this turn.
Equip {1}

Each player sacrifices a creature and discards a card.
Fuse (You may cast one or both halves of this card from your hand.)

Haste
When Jetskate enters, if you've drawn two or more cards this turn, it deals 2 damage to any target.
Cycling {R} ({R}, Discard this card: Draw a card.)

Vigilance
{1}{W}: Jhessian Cavalier gains lifelink until end of turn.

When Jidai Clairvoyant enters, create a 2/2 colorless Spirit creature token.
Whenever a colorless creature you control enters, you may draw a card.

This spell costs {1} less to cast for each spell you cast this turn.
When Jidai Serpent enters, draw two cards.

When Jinyu Mirror-Blade enters, you may exchange its base power with another target creature's base power until either leave the battlefield.

Johanna, Skarvith Marshal has first strike as long as it's attacking.
Whenever you attack, you may pay {X}{R/W}{R/W}. When you do, put a +1/+1 counter on each of up to X target attacking creatures. Those creatures gain first strike until end of turn.

Choose two. You may choose the same mode twice —
• Create a 1/1 green Insect creature token.
• Put a +1/+1 counter on target creature you control.

Creatures you control get +1/+1 and gain flying and lifelink until end of turn.

Enchant creature
When Join the Pack enters, create a 2/2 green Wolf creature token.
Enchanted creature gets +2/+2.

Return target creature card from your graveyard to your hand. Catalyze. (The next spell you cast this turn costs {1} less to cast.)
Flashback {3}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Trample
{1}{R}: Each attacking creature you control with trample gets +1/+0 until end of turn.

Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle. You gain 3 life.

Wanderlust — Target creature you control gets +2/+2 until end of turn. If you control four or more differently named lands, that creature gains protection from everything until end of turn.

When Journey through Kareki enters, draw a card, then choose a creature card name.
Creatures you control with the chosen name get +1/+1.

When Journey through Kitasan enters, draw a card, then choose a creature card name.
{1}{W}: Put a +1/+1 counter on each creature you control with the chosen name. Activate only as a sorcery.

When Journey through Masamori enters, draw a card, then choose a creature card name.
Creatures you control with the chosen name have “{T}: Add one mana of any color.”

When Journey through Moranai enters, draw a card, then choose a creature card name.
Creatures you control with the chosen name have haste and “{R}: This creature gets +1/+0 until end of turn.”

When Journey through Odaya enters, draw a card, then choose a creature card name.
Creatures you control with the chosen name can't be blocked.

When Journey through Uwaito enters, draw a card, then choose a creature card name.
Whenever a creature you control with the chosen name dies, each opponent discards a card.

Look at the top four cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest into your graveyard.

When Journey to the Otherworlds enters, draw a card, then choose a creature card name.
Whenever a creature you control with the chosen name attacks, you may aetherize it. (To aetherize, create a token that's a copy of it, then exile that token.)

When Journey to the Syzygy Spire enters, draw a card, then choose a creature card name.
Whenever a creature you control with the chosen name deals combat damage to a player, draw a card.