msem-instigator

When Fox of the Molten Dawn enters, you may return target Aura card with mana value 3 or less from your graveyard to the battlefield attached to a permanent it could enchant.

Whenever Fox of the Mushroom Forest enters or deals combat damage to a player, its activated abilities cost {W} less to activate until your next turn.
{W}, Sacrifice Fox of the Mushroom Forest: Counter target noncreature spell unless its controller pays {2}.

When Fox of the Sunset Legion enters, create two 1/1 white Fox Spirit creature tokens.

Defender, lifelink

Foxflame deals 4 damage divided as you choose among up to one target attacking creature and up to one target blocking creature.

Whenever an enchantment you control enters, put a +1/+1 counter on Freeborn Healer.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)

When Fretport Warden enters, scry 2.

At the beginning of your end step, if you own a card in exile, create a 1/1 white Spirit creature token with flying.

Flash
When Frontier Paragon enters, untap all creatures you control.

When Frontier Savior enters, return up to two target creature cards with mana value 3 or less from your graveyard to the battlefield.

Improve {W} ({W}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
Whenever Frontier Wayfinder attacks, untap each other creature you control.

Frontline Banneret has first strike as long as it's your turn.
When Frontline Banneret enters, put a +1/+1 counter on another target Knight or Soldier you control.

Motivate 1 (When this creature enters, you may motivate target creature with less power than this by putting a +1/+1 counter on it.)

First strike

When Frontline Veteran enters, you may sacrifice another creature or artifact. If you do, draw a card.

Lifelink
Frostguard Sentry has flying as long as it has a +1/+1 counter on it.

As an additional cost to cast this spell, you may pay {3}{W}.
Choose a nonland permanent type. Destroy all permanents of the chosen type. If this spell's additional cost was paid, destroy all permanents of the chosen type you don't control instead.

Lifelink
When Funerary Daoshi enters, return target creature card with mana value 3 or less from your graveyard to your hand.

{1}{W}: Exile Furtive Witch. If you do, exile another target nonland permanent. Return both of those cards to the battlefield at the beginning of the next end step under their owners' control.

If you control an Angel, Demon, Faerie, or Spirit, draw a card.
Exile target nonland permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Flying, vigilance
At the beginning of your upkeep, if you have 10 or more life than your starting life total, put a +1/+1 counter on each other creature you control.

First strike
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.)
Creatures you control with -1/-1 counters on them have double strike.

Vigilance
Improve {1}{W} ({1}{W}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)