How strong would each of these fictional Magic: The Gathering cards be in either Modern or Commander formats, part 2?

[SeekerOfTruth007]

Nishryu 3B

Creature - Shadow - Rare

First Strike.

When Nishryu deals combat damage to a player, that player Exiles a card at random from their hand.

Mislead. (The first time Nishryu would be destroyed, instead return it to the Battlefield and it loses this ability permanently.)

3/1

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Zombie Apocalypse XB

Sorcery - Rare

As an additional cost to cast Zombie Apocalypse, Pay X Life.

Create X 2/2 Black Zombie Creature Tokens.

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Fire Mephit RR

Creature - Demon - Rare

Flying.

R: Fire Mephit gains +1/+0 until end of turn.

2/1

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Stack Attack R

Instant - Rare

Reverse the order of all spells on the Stack.

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Samurai Champion 1G

Creature - Samurai - Rare

1G: Samurai Champion gains +2/+2 until end of turn. Use this ability only once each turn.

2/2

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Power Word: Overwhelm G

Instant - Rare

Target Creature gains +2/+2 and Hexproof until end of turn. At end of turn, put a +1/+1 counter on that Creature.

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Warding Whip 1WW

Enchantment - Rare

At the beginning of your Upkeep, each other player sacrifices an Artifact or Enchantment if able.

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Command W

Instant - Rare

Turn target Face-Up Creature Face-Down. (A Face-Down creature becomes 2/2, colorless, and loses all abilities except Morph abilities.)

Draw a card.

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Jakenapes UU

Creature - Shapeshifter - Rare

1U, Discard a card: Jakenapes gains +3/+3 permanently, but loses this ability permanently. Use this ability only once per turn.

2/2

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Specter's Double UU

Creature - Doppleganger - Rare

Vigilance. Menace.

2/2

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Tackle Dummy 0

Artifact Creature - Soldier - Rare

Protection from Creatures.

0/2

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Spark of Life G

Sorcery - Rare

Put the top card of your Library onto the Battlefield face-down. Treat it as a 2/2 Colorless Creature with no abilities. For the remainder of the game, you may look at that card any time. You may play the card as though it were in your hand by paying its Mana Cost.

[AI Opinion]

Fun batch 😊 I’ll stick to power level and where they’d actually see play.

Nishryu: Very strong in Commander hand‑hate decks, probably too slow for Modern.

Zombie Apocalypse: Terrible in Modern, maybe fringe in Aristocrats/token EDH, but life cost makes it worse than existing options.

Fire Mephit: Unplayable in both; strictly worse than modern red threats.

Stack Attack: Wild rules text, but mostly a meme; too narrow for real play.

Samurai Champion: Solid limited-style card, below rate for Modern, maybe okay in budget EDH.

Power Word: Overwhelm: Excellent green combat trick, playable in Commander, borderline Modern sideboard tech.

Warding Whip: Brutal in Commander artifact/enchant heavy pods, likely a hate-staple there, too slow for Modern.

Command: Insane in formats with Morph/Manifest; in Commander, solid cantrip tempo piece; not Modern‑playable.

Jakenapes: Scary in Commander if built around; discarding to permanently grow is strong. Still too clunky for Modern.

Specter’s Double: Underwhelming. No evasion beyond menace, no scaling; mostly draft‑level power.

Tackle Dummy: Completely busted. Zero‑mana blocker with protection from creatures stonewalls combat and is hard to remove. Would be banned quickly in Commander and unprintable in Modern.

Spark of Life: Very cool design. In Commander, strong value/card‑advantage tool. In Modern, probably too slow, but combo players might try to abuse the Manifest‑style line.

[Anonymous]

Some of those would be really strong indeed.