msem-instigator

Flamewhip deals 2 damage to each non-Goblin creature.
If you control a Goblin creature, create a 1/1 red Goblin creature token.

Target creature you control deals damage equal to its power to target creature or planeswalker you don't control. Scry 1.

Chained Wildborn can't attack or block alone.

Target creature gets -1/-1 until end of turn. If that creature is tapped, it gets -3/-3 until end of turn instead.

Gain control of target artifact or creature until end of turn, then untap it. It gains haste until end of turn. You may spend mana as though it were mana of any type to pay the costs of its abilities this turn.

Target player reveals their hand. You choose a nonland card from it. That player discards that card if it has mana value 2 or less or this spell was foretold.
Foretell {B} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Whenever Rambunctious Upstart attacks, up to one target creature gets -3/-1 until end of turn and up to one target creature gets +3/+1 until end of turn.

As Sorcerous Spyglass enters, look at an opponent's hand, then choose any card name.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Sacrifice a creature: Rapacious Demon gets +1/+1 and gains flying until end of turn. Activate only as a sorcery.

This spell can't be countered.
Trample
Whenever Lumbering Thoctar becomes the target of a spell or ability, counter it. Then put a stun counter on Lumbering Thoctar.
Whenever Lumbering Thoctar becomes untapped, draw a card.

Trample
At the beginning of your upkeep, sacrifice another creature. If you do, put X +1/+1 counters on Demented Host, where X is that creature's power.

Enchant creature
When Mantle of the Returned enters, return target creature card from your graveyard to the battlefield. It's a Zombie in addition to its other types.
Enchanted creature gets +1/+1 for each Zombie you control.

Menace
When Zygos's Decimators enters, put a number of +1/+1 counters on it equal to your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.)

Whenever you sacrifice a permanent, you may pay {1}. If you do, you draw a card and you gain 1 life.

{4}{G}: Monstrosity 2. (If this creature isn't monstrous, put two +1/+1 counters on it and it becomes monstrous.)
When Mountain Bighorn becomes monstrous, you may have it fight target creature you don't control.

Lifelink
Pay 3 life: Flightful Fledgling gains flying until end of turn.

First strike

Vigilance
If another creature would die, exile it instead.
At the beginning of your upkeep, return each creature card exiled with Arbiter of Endless Summer to the battlefield under its owner's control.

When Horizon Gazer enters, reveal the top two cards of your library. Put a noncreature card revealed this way into your hand and the rest into your graveyard.
Ascend {3}{G} ({3}{G}: Exile this creature, then return it to the battlefield transformed. Ascend only as a sorcery.)

When Scrapgear Contraption dies, you may put a +1/+1 counter on target creature.

Enchant creature
When Knightly Valor enters, create a 2/2 white Knight creature token with vigilance. (Attacking doesn't cause it to tap.)
Enchanted creature gets +2/+2 and has vigilance.

When Weald Wanderer enters, you gain 3 life and each opponent loses 2 life.
{1}, Pay 1 life: Shuffle Weald Wanderer into its owner's library. If you do, draw a card.

Deception {2}{U} ({2}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Frostclaw Shinobi deals combat damage to a player, scry 1, then draw a card.

Garden Cherub's power and toughness are each equal to the number of creatures you control.
Garden Cherub can't be blocked by creatures with power 2 or less.

When Sabne's Autumn enters, search your library for a Forest card, reveal it, put it into your hand, then shuffle. You gain 3 life.
{1}{G}{G}: Transform Sabne's Autumn. Activate only if your fealty to Forests is five or greater.