Leave the battlefield

• Skyclave ApparitionWhen this creature leaves the battlefield, the exiled card's owner creates an x/x blue illusion creature token, where x is the mana value of the exiled card.
• NecromancyWhen this enchantment enters, if it's on the battlefield, it becomes an aura with "enchant creature put onto the battlefield with ~." put target creature card from a graveyard onto the battlefield under your control and attach this enchantment to it. when this enchantment leaves the battlefield, that creature's controller sacrifices it.
• Oblivion RingWhen this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Then: Create a token, Put a +1/+1 counter, Put a counter

• Skyclave ApparitionWhen this creature leaves the battlefield, the exiled card's owner creates an x/x blue illusion creature token, where x is the mana value of the exiled card.
• NecromancyWhen this enchantment enters, if it's on the battlefield, it becomes an aura with "enchant creature put onto the battlefield with ~." put target creature card from a graveyard onto the battlefield under your control and attach this enchantment to it. when this enchantment leaves the battlefield, that creature's controller sacrifices it.
• Oblivion RingWhen this enchantment leaves the battlefield, return the exiled card to the battlefield under its owner's control.

Then: Create a token, Put a counter, Put a +1/+1 counter

• Emrakul, the World AnewWhen ~ leaves the battlefield, sacrifice all creatures you control.
• Yukora, the PrisonerWhen ~ leaves the battlefield, sacrifice all non-ogre creatures you control.
• Extractor DemonFlying whenever another creature leaves the battlefield, you may have target player mill two cards. unearth {2}{B}

Then: Leave the battlefield, Return a card from a graveyard, A creature enters the battlefield

• The OozeWhenever a creature you control with a +1/+1 counter on it leaves the battlefield, create a mutagen token for each +1/+1 counter on it.
• Splinter, the MentorMenace whenever ~ or another nontoken creature you control leaves the battlefield, create a mutagen token. partner—character select
• Angelic SleuthWhenever another permanent you control leaves the battlefield, if it had counters on it, investigate.

Then: Leave the battlefield, Sacrifice a permanent, Become tapped

• Skyclave ApparitionWhen this creature leaves the battlefield, the exiled card's owner creates an x/x blue illusion creature token, where x is the mana value of the exiled card.
• Chittering DispatcherWhen this creature leaves the battlefield, create a 0/1 colorless eldrazi spawn creature token with "sacrifice this token: add {C}."
• The OozeWhenever a creature you control with a +1/+1 counter on it leaves the battlefield, create a mutagen token for each +1/+1 counter on it.

Then: Enter the battlefield, A creature enters the battlefield, permanents to sacrifice

• Village RitesAs an additional cost to cast this spell, sacrifice a creature. draw two cards.
• Ashnod's AltarSacrifice a creature: add {C}{C}.
• Diabolic IntentAs an additional cost to cast this spell, sacrifice a creature. search your library for a card, put that card into your hand, then shuffle.

• FarewellChoose one or more —
• Buried Ruin{2}, {T}, sacrifice this land: return target artifact card from your graveyard to your hand.
• VictimizeChoose two target creature cards in your graveyard. sacrifice a creature. if you do, return the chosen cards to the battlefield tapped.

• Font of Agonies{1}{B}, remove four blood counters from this enchantment: destroy target creature.
• Khalni Heart ExpeditionRemove three quest counters from this enchantment and sacrifice it: search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
• Gemstone Mine{T}, remove a mining counter from this land: add one mana of any color. if there are no mining counters on this land, sacrifice it.