msem-instigator

Haste
When Challenging Pupil enters the battlefield, conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

When Chamber of Penance enters the battlefield, exile target nonland permanent an opponent controls until Chamber of Penance leaves the battlefield.

When Chamber of Reflections enters the battlefield, draw a card, then choose a legendary card name.
Permanents you control with the chosen name have hexproof and the “legend rule” doesn't apply to them.

Chamber of Splendor enters the battlefield tapped.
When Chamber of Splendor enters the battlefield, you may pay {1}. If you do, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{T}: Add {C}.

Flash
Flying
When Champion of the Provinces enters the battlefield, return any number of other permanents you control to their owner's hands.

Flying
When Champion's Steed enters the battlefield, put a flying counter on target Avatar you control without flying.

When Channeler of the Veil enters the battlefield, create a 1/1 colorless Construct artifact creature token.
Sacrifice another creature: Each opponent loses 1 life.

When Chantwood Channeler enters the battlefield from your graveyard, it gains haste and creatures you control get +3/+3 and gain trample until end of turn.
{5}{G}{G}{G}, Sacrifice a creature: Return Chantwood Channeler from your graveyard to the battlefield. Activate only as a sorcery.

When Chaotic Pupil enters the battlefield, harmonize twice. (To harmonize, trigger up to one harmony of a permanent you control.)
Harmony — Draw a card, then discard a card.

Reach
When Chaparral Hunter enters the battlefield, if a permanent you controlled died this turn, draw a card and you gain 3 life.

When Chapel Defendant enters the battlefield, you gain 1 life for each Citizen you control.

Primal {G} (During your turn, you may cast this spell for {G} instead of playing a land.)
When Charging Nymph enters the battlefield, it gets +2/+0 and gains haste until end of turn.

Enchant creature
When Charmed Sleep enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

When Charming Marauder enters the battlefield, you may destroy target artifact or enchantment.
Recite {2}{W} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters the battlefield or if it would leave the battlefield.)

Flash
When Charnel Legion enters the battlefield, destroy target creature or planeswalker an opponent controls that was dealt damage this turn. When you do, you gain 2 life.

Chartered Treasury enters tapped.
When Chartered Treasury enters the battlefield, look at the top card of your library. You may put it into your graveyard.
{T}: Add {R} or {G}.

When Chigau, the Red Market enters the battlefield, draw a card, then choose a creature card name.
Once each turn, you may cast a creature spell with the chosen name from your graveyard.

When Chiheisen, Terrace of Serenity enters the battlefield, draw a card, then choose a creature card name.
Spells you cast with the chosen name cost {2} less to cast.

When Chikyu Champion enters the battlefield, choose up to one for each land you control. Create a creature token for each of the chosen characteristics.
• 3/3 red Elemental Mouse with haste.
• 3/3 white and blue Fox with vigilance.
• 4/4 green Plant Dinosaur with trample.
• 4/4 red Dragon with flying.
• 4/4 blue Turtle with hexproof.
• 5/5 white Bear Beast.

Enchant creature
When Child of the Pack enters the battlefield, create a 2/2 green Wolf creature token.
Enchanted creature gets +1/+1 for each Wolf you control.

Harmony — Tap target creature. That creature doesn't untap during its controller's next untap step.
When Chilling Musician enters the battlefield, harmonize. (Trigger up to one harmony of one permanent you control.)

When Chiseled Familiar enters the battlefield, draw a card.
Sacrifice Chiseled Familiar: You gain 2 life.

Enchant creature
When Chords of Order enters the battlefield, put a +1/+1 counter on enchanted creature.
Whenever enchanted creature attacks, tap up to one target creature without a +1/+1 counter on it, then untap up to one target creature with a +1/+1 counter on it.

Flash
Flying, lifelink, deathtouch
When Chosen of Aminatou enters the battlefield, scry 2, then draw a card.

When Chroma's Guidance enters the battlefield, create a 2/2 green Wolf creature token.
Whenever you create a creature token, put a +1/+1 counter on it.