msem-instigator

At the beginning of your end step, untap all lands you control. You may put three +1/+1 counters on target land you control. If you do, that land becomes a 0/0 Treefolk creature with haste that's still a land.

Vigilance
Warriors you control have ward {X}, where X is the number of Warriors you control. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {X}.)

Trample
Menagerie — Whenever Frondpond Fledglings attacks, if there are five or more creature types among creatures you control, put a +1/+1 counter on it.

Trample
Frontier Hoof gets +1/+1 for each other Centaur you control.

If you would lose unspent mana, that mana becomes colorless instead.

Trample

When Frontier Scouts enters, reveal the top card of your library. If it's a land, put it onto the battlefield tapped.

Improve {G} ({G}: 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.)
When Frontier Trackers dies, create a 1/1 green Elf creature token.

First strike
When Frontline Descender enters, you may salvage an instant or sorcery card. (Exile one from your graveyard until this creature leaves the battlefield. Whenever this creature deals combat damage to a player, put a card it salvaged into your hand.)

When Frostfield Swordsman enters, arm it. (Create a colorless Equipment artifact token with “Equipped creature gets +1/+0” and equip {2}, then attach it to that creature.)

Each land you sacrifice while casting Frostfire Hulk pays for {1}.
Frostfire Hulk enters with a +1/+1 counter for each land card in your graveyard.
Sacrifice Frostfire Hulk: It deals X damage to target creature or planeswalker, where X is the number of +1/+1 counters that were on it. Activate only as a sorcery.

Choose one —
• Fuel for the Fire deals 5 damage to target creature or planeswalker. Its controller creates a tapped Treasure token. If a permanent dealt damage this way would die this turn, exile it instead.
• Exile target artifact. Its controller creates a tapped Treasure token.

Catalyze. (The next spell you cast this turn costs {1} less to cast.)
Fueled Flame deals damage to any target equal to the number of times you've catalyzed this turn.

This spell costs {1} less to cast for each creature card in your graveyard.

Enchant creature
Enchanted creature gets +2/+3 and has trample.

At the beginning of your draw step, draw an additional card. If you control three or more artifacts, draw two additional cards instead.
At the beginning of your end step, discard your hand.

Whenever a creature you control dies, put a +1/+1 counter on Funerary Barge.
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

Create three 1/1 green Saproling creature tokens.

Voracious 2 (As this enters, you may sacrifice up to two artifacts and/or creatures. This creature enters with that many +1/+1 counters on it.)
Trample
At the beginning of your end step, if a creature died under your control this turn, create a 1/1 green Saproling creature token.

Destroy all artifacts and enchantments with mana value 1 or less.
Draw a card.

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.)

Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gets +1/+0 and gains haste.

Furious Blow deals 4 damage to any target.
{2}{R}, Exile Furious Blow from your graveyard: Search your library for an Ameret planeswalker card or a card named The Lost and Seeking, reveal it, put it into your hand, then shuffle.

Desecrate (When this creature enters, you may sacrifice an artifact or land.)
When Furnace Golem desecrates a permanent, you may return target artifact card from your graveyard to your hand.

If a source you control would deal noncombat damage, it deals double that damage instead.