Bigger

Sorcery (R)

The next time a creature enters the battlefield under your control this turn, it enters with three additional +1/+1 counters on it.

/// Fuse (You may cast one or both halves of this card from your hand.) ///

Better

Sorcery (R)

Choose target creature you control. Reveal cards from the top of your library until you reveal a creature card with a greater mana value than it. Put that card onto the battlefield, then shuffle the targeted creature and all other cards revealed this way into your library.

Better You Than Me
Instant
The next time you would lose the game this turn, instead choose target creature or planeswalker you control and exchange your life total with its toughness or loyalty.

You Should Know Better —
Instant (U)
You gain control of target attacking creature until end of turn.

Know Bittersweet Truths

Instant (C)

As an additional cost to cast Know Bittersweet Truths, discard a card.
Create two Regret tokens. (They're colorless enchantments with ", Sacrifice this enchantment: Return a card at random from your graveyard to your hand.")

Some scars are engraved in the heart.

Heaven's Sweet Nectar —
Enchantment (R)
: You gain 1 life.
: If your life total is more than double your starting life total, draw a card.
Activate abilities of Heaven's Sweet Nectar only once each turn.

OR

Faeries Wear Boots
Enchantment - Saga
I - Create a 1/1 blue Fairie creatue token with flying and a 2/2 white Dwarf creature token.
II, III - You gain 2 life and scry 2.
IV - Draw three cards. Fairie and Dwarf creatures you control gain hexproof and indestructible until end of turn.

Furred Boots
Artifact - Equipment
Spells that target equipped creature cost less to cast.
: Equip Furred Boots to target creature.
Guaranteed to get everyone's attention.

Furry Little Monster —
Creature — Yeti (R)
Flash
When Furry Little Monster enters into the battlefield, it fights target creature.
1/1

Monster Energy Drink
Artifact - Food
, , Sacrifice ~: You gain 3 life. Up to one target creature gets +1/+0 and Haste until end of turn. Then if that creature has three or more instances of Haste, it deals damage equal to its power to itself.

Drinking Contest

Instant (C)

Target creature you control fights target creature you don't control. In this fight, those creatures deal damage equal to their toughness instead of their power.

Even Doran, the mightiest of all oaks, conceded when the shield sphere showed no signs of stopping.

Contest the Results
Instant
Convoke
Exile target spell an opponent controls and put X plus one time counters on it. That card gains "Tap an untapped creature you control: Remove a time counter from this card." If it doesn't have suspend, it gains suspend.

Paternity Test Result
Artifact - Clue
, , Sacrifice ~: Draw a card. If a creature entered the battlefield under your control this turn, draw two cards instead.
"In the case of ten month old Victoria, Edgar, you are the father."

Predator's Instinct
Sorcery
Target green creature you control fights target creature you don't control.
Madness
Before thought of community, the instinct of kin. Before thought of justice, the instinct of hunger.

Unwilling Predation —
Sorcery (U)
You gain control of target creature until end of turn. It fights another target creature you don't control.

Unwilling Accomplice
Sorcery
Gain control of target creature until end of turn. Untap that creature. It gains haste until end of turn.
Morbid - If a creature died this turn, gain control of that creature instead. (This effect does not end at end of turn.)

"Accomplice" is not actually related to this but...

Fait Accompli
Sorcery
This spell can't be countered.
Choose one—

• Until end of turn, spells and abilities you control can't be countered and permanents you don't control lose and can't gain hexproof, indestructible, or ward.
• Until end of turn, target permanent you control gains hexproof, indestructible, and "You may have this permanent assign its combat damage as though it weren’t blocked."
• Return target permanent card from your graveyard to your hand.

"You cannot escape your destiny anymore than you can escape the bounds of Theros." — Klothys

All good; Im actually surprised the two words arent related at all despite having the same etymology (Latin > Old French > Middle English).

Face the Facts
Enchantment
When ~ enters the battlefield, create a Clue token.
Whenever you activate an ability of a Clue token, if you sacrificed it, target opponent discards a card. If they can't, that player loses 2 life and you gain 2 life.

Koh the Face-Stealer
Legendary Creature — Spirit
Whenever an ability of a creature you don't control is activated or triggered, Koh the Face-Stealer becomes a copy of that creature except Koh has this ability and its base power and toughness. That creature loses its name and abilities.
3/3