msem-instigator

As Flourishing Waterways enters, you may reveal a Forest or Island card from your hand. If you don't, Flourishing Waterways enters tapped.
{T}: Add {G} or {U}.

At the beginning of each combat, prevent all combat damage that would be dealt to and dealt by up to one target creature this turn.
{X}{G}{U}, Sacrifice Foreboding Calm: Create an X/X green and blue Plant Horror creature token with hexproof and trample.

Search your library for a creature card, an instant card and a sorcery card and reveal them. Put one of those cards into your hand, exile the rest, then shuffle.

Ward {2}
As long as you control six or more lands, Frondpond Errand-Runner gets +2/+0 and can't be blocked.

Frontier Base enters tapped unless you have 15 or less life.
{T}: Add {G} or {U}.

Untap all permanents you control.
Coalesce {5}{G}{U} (You may cast this from your graveyard for {5}{G}{U}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
{G}{U}: Untap Fulfill Twisted Dreams.

Whenever another creature you control enters, put a +1/+1 counter on each creature you control with lesser power or lesser toughness than that creature.

Create three 1/1 blue Advisor creature tokens.
Monument {2}{G}{U} (You may cast this transformed from your graveyard for its monument cost. Exile it if it would leave the battlefield or not resolve.)

GenTech Labs enters tapped.
{T}: Add {G} or {U}.
{G}{U}, {T}: Create a Function token with “This spell costs {1} less to cast if its mana value is 5 or greater.” Activate only if you have four or more cards in hand. (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Generative Edge enters tapped.
{T}: Add {G} or {U}.
{G}{U}, {T}, Sacrifice Generative Edge: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Flash
Players can't discard cards.
Whenever Gim-Chimya, the Invisible attacks, it can't be blocked this turn unless defending player pays {1} for each card in your hand.

Flash
When Giver of Martoob enters, put a +1/+1 counter on each of up to two target creatures you control.

{G}{U}: Glacier Tortoise gets +5/-5 until end of turn. Activate only once each turn.

Flying
When Glenach enters, put three -1/-1 counters on a creature you control.
When Glenach leaves the battlefield, return target non-Insect permanent card from your graveyard to your hand.

Prismatic — Whenever you cast a multicolored spell, draw a card.

Create a token that's a copy of target creature you control. Exile the token at the beginning of the next end step unless Glintwing Replica was cast from exile.
Prophecy {1}{U} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Flying
Whenever you cast a noncreature spell, create a 1/1 blue Faerie Rogue creature token with flying.
Whenever one or more creature tokens you control deal combat damage to a player, you may pay {G/U}. If you do, draw a card.

Reveal the top three cards of your library. You may put a land card from among them onto the battlefield tapped, then you may put a creature card from among them into your hand. Put the rest on the bottom of your library in any order.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Gui can't attack or block unless you're in a renaissance.
{T}: Reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it back on top or into your graveyard and you gain 3 life.

Hexproof, trample
Whenever Gui, the Islandbringer deals combat damage to an opponent, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand.

You may look at the top card of your library any time.
{T}: Reveal the top card of your library. If that card has a creature type no creature you control has, put it into your hand.

Creature spells you cast cost {1} less to cast for each of their creature types that no creature you control has.
Whenever you cast a creature spell, if it has a creature type no creature you control has, draw a card.

When this creature enters, if you cast it, reveal the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If it's a nonland card with mana value less than or equal to the number of lands you control, you may cast it without paying its mana cost. If you do neither, put it into your hand.

Flying, trample
Harbinger of Falling Skies enters with X +1/+1 counters on it.
Whenever Harbinger of Falling Skies attacks, you may remove a +1/+1 counter from it. If you do, draw a card.

Untap all other Elves you control during each other player's untap step.
You may cast spells as though they had flash.