How balanced are these custom MTG cards for Modern and Commander?

[SeekerOfTruth007]

Fake Organism U

Creature - Illusion - Rare

Flying.

When Fake Organism attacks or blocks, return it to owner's hand at end of combat.

3/3

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Twin Dragons 6RR

Creature - Dragon - Rare

Flying. Trample.

When Twin Dragons enters the Battlefield, create a 6/6 Red Dragon creature token with Flying and Trample.

6/6

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Nishryu 3B

Creature - Spirit - Rare

First Strike.

When Nishryu damages a player, that player exiles a card at random from their hand.

The first time Nishryu would die, return it to the battlefield with a finality counter on it instead.

4/2

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Baal Spawn 3BB

Creature - Demon - Rare

Protection from sources with Mana Value 4 or less.

5/5

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Wholistic Medicine 1GG

Enchantment - Rare

0: You gain a Poison Counter. Prevent all damage target source would deal to you this turn.

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Necromancer's Gambit B

Sorcery - Rare

You may cast your next spell without paying its mana cost. If you do, gain Poison Counters equal to its Mana Value.

Draw a card.

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Energy Pet 1R

Creature - Dog - Rare

When Energy Pet Enters or Leaves the Battlefield, create a Treasure Token.

2/2

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Love Token 1RR

Sorcery - Mythic

Untap target creature and gain control of it. It gains Haste until end of turn. That creature's owner gains two Treasure Tokens.

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Ultimate End BRGWU

Sorcery - Mythic

Search your Sideboard for any number of Knights and put them onto the Battlefield.

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Gate 2BB

Sorcery - Mythic

As an additional cost to cast Gate, Discard the remainder of your hand.

Search your Library for any creature card and put it directly onto the Battlefield. Shuffle your Library.

The Fated Hour 1UU

Enchantment - Mythic

When you would shuffle your Library, you may put it back in any order instead.

[AI Opinion]

Fun batch 😄 I’ll go card by card, thinking in terms of Modern power and Commander brokenness.

Fake Organism: Fair. Plays like a cheap, sticky evasive threat, but bouncing each combat keeps it in check.

Twin Dragons: Pushed but fine. Eight mana for 12 flying trampling power is big, yet slower than existing Modern finishers. Totally fine in Commander.

Nishryu: Strong but not insane. Hand exile at random is nasty; I’d probably make it 3/1 or 2/2, because recursion plus hand attack screams “Commander salt”.

Baal Spawn: Way too efficient. Protection from MV 4 or less makes a 5/5 that dodges most interaction. Needs higher cost or a drawback.

Wholistic Medicine: Extremely abusable. Repeatable free Fog vs one source for poison is dangerous in Modern; in Commander you’ll almost never die to poison. Needs mana or tap cost.

Necromancer’s Gambit: This is busted. Free spell of any size for a few poison counters plus cantripping is Storm combo heaven. Needs a MV cap or big mana cost increase.

Energy Pet: Very good but printable. Two Treasures on ETB/LTB for 2 mana is pushed; I’d make it 1/1 or remove one trigger.

Love Token: Way too cheap for a steal‑and‑keep effect with minimal downside. At 3 mana with Treasures to the owner, it’s better than Act of Treason variants in most decks. Needs higher cost or “until end of turn” control only.

Ultimate End: Totally broken. Sideboard Knights straight to battlefield dodges normal restrictions and ignores mana. In Commander, “sideboard” is also weird rules‑wise. Needs a cost or MV limit and main‑deck search wording.

Gate: Hyper‑tutorable cheat. One card, any creature straight to battlefield for 4 mana with discard as a “cost” is Griselbrand / Emrakul city. Needs MV cap, higher cost, or “to hand” instead.

The Fated Hour: Completely degenerate. Being able to stack your library every shuffle breaks fetches, tutors, and combo consistency. This would get banned immediately. Needs a serious limitation, like only once per turn or scry‑like effects instead of full control.

Overall, a lot of fun designs, but starting around Gambit, Gate, and Fated Hour you’re deep in “would warp formats instantly” territory 🔥