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.

Cast this spell only during combat.
Untap all attacking creatures and tap all blocking creatures. After this phase, there is an additional combat phase.

Reach
When Roaming Treefolk enters, target creature or Ruin gets +2/+2 until end of turn.
Wander {5}{G}

Target creature gets +2/+0 and gains first strike until end of turn. It gets an additional +1/+0 until end of turn for each time you've amped it up this turn.

Whenever Rogue Justiciar becomes the target of a spell or ability you control, you may tap target creature. This ability triggers only once each turn.

Scry 2, then draw two cards. You lose 2 life.

Flash
Flying

This spell costs {X} less to cast, where X is the amount of life you have more than your starting life total
Lifelink
When Rose Garden Guardian enters, put a +1/+1 counter on each other creature you control with lifelink.

When Rotroot Hauler enters, mill three cards, then you may put a permanent card in your graveyard on top of your library.

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.

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

Flashback costs you pay cost {2} less.
{R}, {T}, Discard a card: Draw a card.

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.

{VP}{VP}, Sacrifice another creature: Draw a card.

Instant and sorcery spells with mana value 4 or greater you cast cost {1} less to cast.
{U}{R}, Sacrifice Samacris: Return target instant or sorcery card from your graveyard to your hand. The next spell you cast this turn with the same name as that card costs {2} less to cast.

Flash
When Sanctum of the Two Truths enters, draw two cards.
Spellcharge 4

[+1]: Choose up to two target creatures. Until your next turn, when one of them leaves the battlefield, exile the other.
[0]: Reveal the top card of your library. You may reveal a card you own from outside the game that shares a mana value or card type with the revealed card. Put one of those cards into your hand and exile the rest.
[–7]: For each permanent on the battlefield, create a token that's a copy of it.

Sashanki, Destiny's Chosen can't be blocked alone except by multicolored creatures.
Whenever Sashanki, Destiny's Chosen attacks, another target creature you control gets +X/+X until end of turn, where X is Sashanki's power.

Prowess
When Satyr Arsonist enters, destroy target nonbasic land. Its controller may search their library for a basic land card, put it onto the battlefield tapped, then shuffle.

Hexproof from permanents

Whenever you cast an instant or sorcery spell, choose one that hasn't been chosen this turn —
• Create a 1/1 colorless Construct artifact creature token.
• Discard a card, then draw a card.
• Add one mana of any type.

{1}{R}, {T}, Discard a card: Draw a card. Scalding Crucible deals 1 damage to each opponent.
Spellcharge 5