msem-instigator

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

Renown 1
Whenever a creature you control becomes renowned, exile the top card of your library. You may play that card this turn.

Players play with the top card of their libraries revealed.
At the beginning of your first main phase, add {G}{G} for each land card among cards on top of libraries.
Jindao, the Coiled Prophet gets +2/+2 for each creature card among cards on top of libraries.

You may look at the top card of your library any time.
Once during each of your turns, you may play a land from the top of your library as though you could play an additional land.
{3}{G}{G}: You may cast the top card of your library without paying its mana cost if it's a creature card. Activate only as a sorcery.

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

Other attacking Foxes you control get +1/+0.
{2}{R}, Sacrifice Jiu: Discard your hand, then draw a card for each tapped Fox you control.

Whenever one or more creatures deal combat damage to you, put a -1/-1 counter on one of them.
Attain {5}{W} ({5}{W}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

When Jobiah, Devoted Farmer enters, search your library for a land card, put it onto the battlefield tapped, then shuffle.
At the beginning of your upkeep, if you control six or more lands with different names, you may transform Jobiah.

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.

If another creature you control would die, exile it instead.
When John Furo, the Unfortunate dies, until your next end step, you may play cards exiled with John Furo.

Destroy target permanent. Trigger a death knell of any number of permanents you control.

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.)

Menace, lifelink
Whenever Jonah of the Spellbane deals combat damage to a player, destroy target creature or planeswalker, then scry 1.

Vigilance, haste
All creatures able to block Jormir, Who Encircles All do so.
Jormir, Who Encircles All can block any number of creatures.

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

Exile up to one target nonland permanent you control and up to one target nonland permanent card with mana value 3 or less from your graveyard. Then return the exiled cards to the battlefield tapped under their owner's control.

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.”