msem-instigator

Dawn Without End deals damage to each opponent equal to the number of nonbasic lands they control.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

When Norwick Militia enters, other Citizens and Peasants you control get +1/+1 and gain vigilance until end of turn.

As an additional cost to cast this spell, you may discard two cards. If you do, this spell costs {3} less to cast and it can't be countered.
Exile the top three cards of your library. You may play those cards until the end of your next turn.

This spell costs {1} less to cast if it targets an attacking creature.
Target creature gets +2/+0 and gains indestructible until end of turn.

Haste
When Scaled Thundercaller enters, target creature gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)

Doomsday Horde enters tapped unless it was foreshadowed.
When Doomsday Horde dies, search your library for a card, put it into your hand, then shuffle.
Foreshadow {3}{B}{B}{B} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Other legendary creatures you control get +1/+1.
At the beginning of your upkeep, you may search your library for a legendary card, reveal that card, and put it into your hand. If you do, you skip your draw step this turn and shuffle.

Creatures your opponents control can't block alone. (They can block different creatures.)

Menace, prowess

{1}: Put a -1/-1 counter on target creature you control. Untap that creature.

First strike, vigilance

Whenever Sphinx's Grandeur or another enchantment you control enters, create a 1/1 white Soldier creature token.
Creatures you control get +1/+1.

Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to another target creature.

Persistent glitch {1}. Spend only mana of a color that hasn't been spent this way to activate this ability. ({1}: Permanently remove one [restriction] from this permanent.)
[+1]: You [and each opponent] may scry 2. Draw a card[, then discard a card.]
[–3]: Exile target nonland permanent [with mana value 4 or less]. [Its controller creates a Treasure token.]
[–6]: Create five 2/2 blue Elemental creature tokens with flying [and -1/-1 counters on them].

Deathtouch

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
Curious Cubs has first strike as long as its attacking.
When Curious Cubs has three or more +1/+1 counters on it, remove them all and transform it.

Enchant creature
Enchanted creature can't block or be blocked.
{U}: Enchanted creature gets +1/+0 or -1/-0 until end of turn.

Flying
Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

When Fang Den Headhunter enters, look at the top card of your library. If it's a creature card, you may reveal it and draw a card.

{T}: Add {C}.
{3}, Discard Ancient Ossuary: Search your library for a land card, reveal it, put it into your hand, then shuffle.

When Gilded Yak enters, you gain 3 life.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
When Tidepool Turtle has three or more +1/+1 counters on it, remove them all and transform it.

Bloodprice {2}{B} (You may cast this card by sacrificing a creature and paying its bloodprice.)
Create X 2/2 black Demon creature tokens, where X is one plus the number of creatures that died this turn.

Deathtouch
When Deadwood Terror enters from a graveyard, create two tokens that are copies of it.
{4}{B}{B}, Sacrifice a creature: Return Deadwood Terror from your graveyard to the battlefield. Activate only as a sorcery.

Non-Human creatures you control get +1/+0.