This spell has lifelink as long as you control a creature with lifelink.
Retaliatory Outburst deals 4 damage to target tapped creature.

Choose one —
• Destroy target artifact.
• Destroy target enchantment.
• Exile target card from a graveyard.

Time loop
I, II — Look at the top six cards of your library. Put up to one nonland permanent card with mana value 3 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
III — Creatures you control gain double strike until end of turn.

Return any number of creature cards with total mana value less than or equal to twice your devotion to black from your graveyard to the battlefield.

Approval — This spell costs {X} less to cast, where X is the number of colors among permanents you control.
Exile target creature.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle. Scry 1.

Tap target creature. It can't become untapped for as long as you control a creature named Tidewake Walker.

Choose one —
• Exile target artifact or enchantment.
• Exile target creature you control, then return it to the battlefield under its owner's control. If that creature entering the battlefield causes any abilities to trigger, those abilities trigger an additional time.

Search your library for a card with flashback and exile it, then shuffle. You may cast that card this turn. At the beginning of your next end step, if that card is in exile, put it into your graveyard.
Flashback {U}{R}

Put two +1/+1 counters on target creature you control. It fights up to one target creature an opponent controls. You gain 4 life.

Target creature you control gains deathtouch until end of turn. When that creature dies this turn, create a 2/2 black Zombie creature token.

{2}, Sacrifice Root Fossil: Surveil 3. You may put a land card you surveilled this way from your graveyard onto the battlefield tapped.
Surface {2}{G}. Root Fossil surfaces transformed.

This land enters tapped unless you control one or fewer other lands.
{T}: Add {U} or {R}.
Cycling {2}

When this land enters, surveil 1.
{T}: Add {C}.
Basic landcycling {2}

Tap up to two target creatures. Put a stun counter on one of them.

Target creature you control gets +2/+2 and gains indestructible until end of turn. If it was the target of another spell or ability this turn, create two 1/1 white Bird creature tokens with flying.

Choose one —
• Each opponent sacrifices a creature that's one or fewer colors.
• Each opponent sacrifices a creature that's two or more colors.

Return target artifact card from your graveyard to your hand.

Put target creature card from a graveyard onto the battlefield under your control.
Cycling {1}{B}
When you cycle this card, target player mills three cards.

Choose any number of permanent cards in your graveyard put there from the battlefield this turn. Return one of them to the battlefield and the rest to your hand.
Cycling {W/B}

Destroy target artifact or enchantment. If it was a token, you draw a card and gain 2 life.

Sacrifice any number of permanents. Ruinous Portents deals X damage to each creature your opponents control and you draw X cards, where X is the number of permanents sacrificed this way.

{T}: Add {C}.
{4}: Rumbling Door becomes a 3/3 Golem creature with vigilance. It's still a land.

Put a +1/+1 counter on target creature you control, then double the number of +1/+1 counters on it.

Draw three cards, then discard a card. If you controlled a white permanent as you cast this spell, tap up to one target nonland permanent.