msem-instigator

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

Gathering Beacon enters tapped.
{T}: Add {G}.
{2}, {T}, Sacrifice Gathering Beacon: Choose a creature or planeswalker type, then reveal the top five cards of your library. You may put a card of the chosen type into your hand, then put the rest on the bottom in any order.

Creatures you control get +1/+1 and gain trample and lifelink until end of turn.

As an additional cost to cast this spell, discard a card.
Draw two cards. Gift of the Phoenix deals 2 damage to you.

{T}: Add three mana of any one color.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Sacrifice another creature: Grindlesnap gets +3/+2 and gains trample until end of turn if that creature was a Crocodile. Otherwise, it gets +1/+1 until end of turn.
Whenever Grindlesnap is dealt combat damage, create a 3/2 green Crocodile creature token with trample.

Sacrifice another creature: Grisly Rougarou deals damage equal to the sacrificed creature's power to any target.

Untap target creature. It gets +1/+3 until end of turn.

Tithe (As you cast this spell, you may tap three artifacts and/or creatures you control.)
Creatures you control gain indestructible until end of turn. If this spell's tithe was paid, put a +1/+1 counter on each creature you control.

[+1]: Create a 1/1 red Cleric creature token. If you control three or more Clerics, you may instead create Aspect of Faradia, a legendary 5/5 white Angel creature token with flying and vigilance.
[–1]: Exile target creature if you control an Angel. Otherwise, that creature can't attack or block and its activated abilities can't be activated until your next turn.
[–7]: Creatures you control get +5/+5 and gain flying and vigilance until end of turn.

Flying, haste
Whenever you attack with three or more creatures, harmonize three times. (To harmonize, trigger up to one harmony of a permanent you control.)
If you would harmonize, you may instead return Herald of Festivities from your graveyard to your hand.

Lifelink
Tap three other untapped creatures and/or artifacts you control: Transform Heroic Crusader.

Attacking creatures get +2/+0 and gain trample until end of turn.

Enspirit (As you cast this spell, you may exile a nonenchantment creature you control until this leaves the battlefield or fails to resolve. Reduce this spell's cost by the exiled card's mana value.)
You may play any number of lands on each of your turns.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast enchantment spells.

Repeat the following process X times. Exile a creature you control, then return it to the battlefield under your control.
Exile Lazaire's Conjuring.

Menace
Lonely Devil can't attack or block alone.

Exile the top three cards of your library. For each land card exiled this way, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.” Until the end of your next turn, you may cast nonland cards exiled this way.

Put target nonland permanent on top of its owner's library.
Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Add three mana of any one color.

Flash (You may cast this spell any time you could cast an instant.)
{2}{G}: Luminescent Croaker gains indestructible until end of turn.

Exile any number of target creatures. For each creature exiled this way, its controller creates a 3/2 green Crocodile creature token with trample.