msem-instigator

Whenever Tortle Veteran or another Turtle you control enters, that creature explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

{4}{W}: Tap target creature.

Lifelink
When Vel enters, choose up to one other target nonland permanent. If you gained or lost life this turn, exile that permanent until Vel leaves the battlefield.

Whenever you sacrifice one or more permanents, put a +1/+1 counter on Marsh Dweller.

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

When Fungal Whomper enters, you gain 4 life.
When Fungal Whomper leaves the battlefield, germinate four times. (To germinate, put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

Return target nonland permanent card with mana value 2 or less from your graveyard to the battlefield.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

{1}{W}, {T}: Put a +1/+1 counter on target creature without a +1/+1 counter. Activate only as a sorcery.

Flying
Prismatic — Whenever you cast a multicolored spell, scry 1.

Flash (You may cast this spell any time you could cast an instant.)
You may cast Wizard spells as though they had flash.
{U}{U}, Tap two untapped Wizards you control: Copy target instant or sorcery spell. You may choose new targets for the copies.

Noncreature spells your opponents cast cost {1} more to cast.

Each player chooses a legendary permanent from among the nonland permanents they control, then sacrifices the rest.

Flying, lifelink

Deception {2}{U} ({2}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Marilye deals combat damage to a player, you may search your library for an artifact card with mana value less than or equal to that amount of damage, put it onto the battlefield, then shuffle.

{1}{W}: Untap Steadfast Infantry.

Foretell {B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)
Up to one target creature gets -1/-1 until end of turn. Put a +1/+1 counter on up to one target creature.

({T}: Add {B} or {R}.)
Molten Falls enters tapped.
{1}, {T}: Add {B}{B} or {R}{R}.

When Fodder Goblins enters, create a 1/1 red Goblin creature token.

{U}: If Engrossed Reader doesn't have flying, put a flying counter on it.
{1}{U}: If Engrossed Reader has flying, draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on Engrossed Reader.
{1}{U}{U}: If Engrossed Reader has a +1/+1 counter on it, it becomes a copy of another target creature until end of turn.

Alpha (You may have this creature enter with a +1/+1 counter on it. If you do, it becomes alpha and can only attack alone.)
Whenever a creature you control attacks alone, untap all lands you control.

{T}: Add {C}.
{1}, {T}: Add {U}{R}.

When Chamber of Reflections enters, draw a card, then choose a legendary card name.
Permanents you control with the chosen name have hexproof and the “legend rule” doesn't apply to them.

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.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Sword Dance deals 3 damage to target attacking or blocking creature. If you're in a renaissance, Sword Dance deals 5 damage to that creature instead.

Destroy target attacking or blocking creature.