msem-instigator

Destroy target artifact or enchantment. Create a 1/1 green Saproling creature token.

Equipped creature gets +1/+1.
Sacrifice Forceglow Shield: Prevent all damage a source of your choice would deal to equipped creature this turn.
Equip {2}

Reveal the top card of your library. You may put it on the bottom of your library. Target creature gets -X/-0 until end of turn, where X is that card's mana value.

Hexproof

Forestheart Elemental enters with a +1/+1 counter on it for each land you control.

Target creature gets +2/+2 until end of turn. If you cast this spell from exile, that creature gets +4/+4 and gains trample until end of turn instead.
Prophecy {G} (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.)

Search your library for two land cards and reveal them. If you attacked this turn, put them onto the battlefield tapped. Otherwise, put them into your hand. Then shuffle.

Choose one —
• Forge Trick deals 3 damage to target creature.
• Target creature gets +3/+0 until end of turn.

Whenever you cast an artifact spell, create a 1/1 colorless Construct artifact creature token.

Search your library for an Equipment card, reveal it, put it into your hand, then shuffle.

{T}, Sacrifice Forgewatcher: Add two mana of any one color. If that mana is spent on a creature spell, it gains haste until end of turn.

Forgotten Attic enters tapped.
When Forgotten Attic enters, look at the top card of your library. You may put it into your graveyard.
{T}: Add {U} or {B}.

Forgotten Consequences deals 2 damage to target attacking or blocking creature.

Forgotten Experiment can't be blocked.

Return target creature or land card from your graveyard to your hand.

Return target creature card from your graveyard to your hand.

When Forgotten Wretch enters, you may sacrifice another creature. If you do, draw a card.

When Forlorn Farmhand dies, create a 1/1 colorless Spirit creature token.

When Forlorn Murklurker dies, submerge the top card of your library. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

Target creature you control gets +3/+0 and gains lifelink and indestructible until end of turn.

Enchant creature
Enchanted creature gets +2/+2 and has flying and haste.
When enchanted creature dies, return it to the battlefield under its owner's control.

Flash
Enchant creature
Enchanted creature has erratic. (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)

Flying
Mark (Whenever this creature attacks, mark target creature until end of turn.)
Whenever a marked creature dies, you gain 2 life.

Whenever you cast a noncreature spell, each opponent loses 1 life and you gain 1 life.