msem-instigator

Vigilance
Whenever Disgruntled Student deals combat damage to a player, scry 2.

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

Reach
Spined Tarantula gets +1/+1 for each creature with flying your opponents control.

Sludge-Gill Fox can't be blocked as long as it's attacking alone.
Whenever Sludge-Gill Fox deals combat damage to a player, you may draw a card.

Ferocious — When Volcanic Whelp enters, if you control a creature with power 4 or greater, Volcanic Whelp gets +3/+0 and gains haste until end of turn.

Flying
Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
Your opponents can't cast spells during combat and can't activate abilities during combat unless they're mana abilities.

Double strike, menace
{R}{W}, Exile Picturesque Champion from your graveyard: Target creature you control gains double strike and menace until end of turn. Activate only as a sorcery.

Triplicate Terror can't be blocked unless defending player pays {3}. (They pay it once each combat.)

Green spells you cast with mana value 5 or greater cost {1} less to cast.
Whenever you cast a green spell with mana value 5 or greater, draw a card.

Creatures you control gain deathtouch until end of turn and must be blocked this turn if able.

Target creature gets -3/-3 until end of turn. Scry 2.

Create an X/X Elemental creature token that's all colors.
Reconstruct {X}{G}{G}{G} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)

This spell costs {1} less to cast for each artifact you control.
Choose two —
• Untap each artifact you control.
• Put a +1/+1 counter on each artifact creature you control.
• Draw a card.

Whenever a Plains you control enters, create a 1/1 white Soldier creature token.
Whenever you attack, you may search your library for a Plains card, reveal it, put it into your hand, then shuffle.

{1}, Sacrifice Aberrant Apostle: Choose one. This ability costs {1} less to activate as long as Aberrant Apostle entered this turn.
• Destroy target artifact.
• Destroy target enchantment.
• Exile target card from a graveyard.

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.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

{T}: Add {C}.
Satrapies you control have “{1}{W}, {T}, Exile a card from your graveyard: Create a 1/1 white Soldier creature token.”

Cresting Bay enters tapped unless you control a basic Island.
{T}: Add {U}.
{2}{U}{U}: Until end of turn, Cresting Bay becomes a 3/3 blue Elemental creature with “Whenever this creature attacks, you may draw a card then discard a card.” It's still a land.

Menace
Revive {1}{R} ({1}{R}, Exile this card from your graveyard: Create a token that's a copy of this card, except it has no mana cost. Activate this ability only any time you could cast a sorcery.)

Art of war — At the beginning of your end step, if Kowareta Informant dealt damage to an opponent this turn, draw a card, then discard a card.

Wild Peak enters tapped unless you have 15 or less life.
{T}: Add {R} or {G}.

Whenever Infiltrator of the Anomalous deals combat damage to a player, add {R}. Until end of turn, you don't lose this mana as steps and phases end.

Whenever Lotus Acolyte attacks, it gets +1/+0 and gains lifelink until end of turn.

{1}{W}: Artifact creatures you control get +1/+1 until end of turn. Activate only once each turn.