msem-instigator

Whenever Font of Natural Essence enters or is put into a graveyard from the battlefield, create two 1/1 green Saproling creature tokens.

{T}: Each opponent loses 1 life and you gain 1 life.
Whenever you cycle a card or cast a spell with a cycling ability, untap Font of Nefarox.

Font of Sorrows and other permanents you control entering the battlefield cause their death knell to trigger.
Death knell — Draw a card. (As a creature you control dies, trigger one death knell of that creature or another permanent you control.)

Whenever Font of Strength enters or is put into a graveyard from the battlefield, target creature you control gets +3/+3 until end of turn.

Any number of target creatures you control each fight target creature with power 3 or greater. (All fight damage happens simultaneously.)

Invigorate 2, then target creature you control fights target creature you don't control. (Choose a creature with the least power among creatures you control and put two +1/+1 counters on it.)

Target creature gets +2/+2 until end of turn. If that creature has mana value 2 or less, it also gains indestructible until end of turn.

Once each turn, when you cast an instant or sorcery spell, you may exile the top two cards of your library if you cast it for its showcase cost, otherwise, look at the top two cards of your library, then put one on the bottom of your library and exile the other. You may play cards exiled this way until you exile one or more other cards with For the Court of the Queen.

Target creature gets +2/+1 until end of turn. (Then exile this card. You may cast the creature later from exile.)

{G}, {T}: Add {C}{C}.

Equipped creature gets +1/+0 and has “Whenever this creature becomes tapped, you gain 1 life.”
Equip {2}

Exile target artifact, enchantment, or creature with flying.

{T}: Add {B} or {R}. You lose 1 life unless you have less life than an opponent.

Forbidding Isle enters tapped unless you control a Swamp.
{T}: Add {U} or {R}.

Enchant nonland permanent
When this enchantment enters or at the beginning of your upkeep, gain control of enchanted permanent until end of turn. Untap that permanent. If it's a creature, it becomes a Pirate in addition to its other types and gains haste until end of turn.

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

If a spell, ability, or creature an opponent controls would deal 4 or more damage to you or cause you to lose 4 or more life, you lose 4 life instead. (Damage won't be dealt.)

Whenever a player casts a spell, put a doom counter on Foreboding Presence.
At the beginning of each player's end step, if no spells were cast this turn, sacrifice Foreboding Presence. It deals damage equal to the number of doom counters on it to that player.

As Foreboding Ruins enters, you may reveal a Swamp or Mountain card from your hand. If you don't, Foreboding Ruins enters tapped.
{T}: Add {B} or {R}.

{2}, Exile a card with a cycling ability from your graveyard: Draw a card.
Cycling {3}{G} ({3}{G}, Discard this card: Draw a card.)
When you cycle Foregone Ancestries, you may exile it. If you do, return target card with a cycling ability from your graveyard to your hand.

When Forerunner of the Briar enters, sacrifice two lands. When you do, choose one —
• Create a 3/3 green Beast creature token.
• Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

You may put a creature or land card from your hand onto the battlefield. Then each opponent may put a permanent card from their hand onto the battlefield. If one does, you may repeat this process.

Forest Fire deals 4 damage to target creature or planeswalker. (Then exile this card. You may cast the creature later from exile.)

When Forest Whale dies, put a number of +1/+1 counters on target creature you control equal to Forest Whale's power.