Equipped creature gets +2/+2 and can't be blocked by more than one creature.
Equip {4}

When Forgemaster Dreadnought enters, create three Treasure tokens.
Spellcharge 9

Whenever Forgotten Cultivator attacks, mill three cards. Return a permanent card from among the milled cards to your hand.
Spellcharge 4

At the beginning of your end step, if a creature died this turn, exile the top card of your library. Until the end of your next turn, you may play that card.

{T}: Add {G}.

Whenever you amp it up, Fraying Gearhead gets +1/+0 and gains first strike until end of turn.

When Free Market enters, target creature gets +2/+2 until end of turn.
You control a creature with power 4 or greater.
You control a creature with toughness 4 or greater.

Whenever you attack, create a 1/1 colorless Soldier creature token that's tapped and attacking.

Frequency Jolt deals 5 damage to target creature, then it deals 2 damage to that creature's controller for each time you've amped it up this turn.

{VP}{VP}{VP}: Put a +1/+1 counter on Frequency Omnivore.

Frostfire Geysers enters tapped unless you control a basic Island or a basic Mountain.

Fungal Mire enters tapped unless you control a basic Swamp or a basic Forest.

Search your library for a basic land card, put it onto the battlefield, then shuffle.

Target creature you control gains double strike until end of turn. It deals damage equal to its power to each of up to two other targets.

Enchant creature
Enchanted creature attacks each combat if able.
Whenever enchanted creature attacks, teach it trample.

As an additional cost to cast instant and sorcery spells, you may pay {X}, where X is that spell's mana value. If you do, copy that spell, and you may choose new targets for the copy.
Spellcharge 4

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast Shrine spells or activate abilities of Shrines.

This spell costs {1} less to cast for each kind of counter among permanents you control.
Reach, trample

Enchant creature
When Gargantuan's Gluttony enters, put three +1/+1 counters on enchanted creature.
Whenever enchanted creature attacks, create a Food token.

Gates to the Underworld enters tapped.
{T}: Add {W} or {B}.
{5}{W/B}: Gates to the Underworld becomes a 3/4 white and black Construct creature with lifelink until end of turn. It's still a land. This ability costs {X} less to activate, where X is your devotion to white and black. Activate only once each turn.

Flash
Vigilance
When Gato Troubador enters, untap each other creature you control. Other creatures you control with vigilance gain indestructible until end of turn.

Choose one —
• Destroy target artifact.
• Target attacking creature gets +3/+3 until end of turn.

{VP}{VP}{VP}: Genre Blender gets +3/+3 until end of turn. Activate only once each turn.