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

[SeekerOfTruth007]

Jakenapes UU

Creature - Shapeshifter - Rare

At the beginning of your Upkeep, remove a +1/+1 counter from Jakenapes or sacrifice Jakenapes.

U, Discard a card: Put three +1/+1 counters on Jakenapes.

2/2

===

Contradict 1G

Instant - Rare

Counter target Black or Blue spell. If that spell is both Black and Blue, draw a card.

===

Khalen, Mother Confessor WWW

Legendary Creature - Cleric - Rare

T: Turn target Face-Up creature Face-Down. (A Face-Down creature becomes 2/2 colorless and loses all of its abilities. That creature's controller may pay its Mana Value to turn it Face-Up again.)

1/3

===

Spiral Ray R

Instant - Rare

As an additional cost to cast Spiral Ray, tap two untapped creatures you control.

Spiral Ray deals 4 damage to target creature or player.

===

Spell Casting Prodigy UUU

creature - Wizard - Rare

UU: Copy target instant or sorcery spell you control. You may choose new targets for each copy.

1/2

===

Contemplate the Cosmos U

Sorcery - Mythic

As an additional cost to cast Contemplate the Cosmos, skip your next turn.

Draw four cards. Your turn ends now.

===

Soul Extraction 2BB

Sorcery - Rare

Exile target creature. Create a 2/2 Black Zombie creature token.

===

Polymorph Other 4U

Instant - Rare

Untap up to five target lands.

Exile target creature. Its controller creates a 1/1 White Rabbit creature token.

===

Power Word: Kill B

Instant - Mythic

Destroy target creature if there is already 3 or more damage on it this turn.

===

Punish W

Instant - Mythic

Destroy target creature which damaged you this turn.

===

Tackle Dummy 0

Creature - Soldier - Rare

Protection from Creatures.

0/1

===

Gate 2BB

Sorcery - Rare

If you are playing Commander, reveal Gate at the beginning of the game. You are allowed to play with a 15 card sideboard while Gate is in your Deck.

As an additional cost to cast Gate, discard a card at random.

Search your Sideboard for any one creature card and put it directly onto the Battlefield.

[AI Opinion]

Fun batch! I’ll go card by card, quick and honest 🧩

Jakenapes: Way too strong in Modern with discard outlets; three counters per card scales absurdly fast. Needs higher activation or fewer counters.

Contradict: Underpowered rare, very narrow. Could be uncommon, maybe cantrip always.

Khalen: White repeatable morph-hate lock, super oppressive in Commander. Needs a mana cost or tap + mana.

Spiral Ray: Balanced, maybe slightly weak for rare; feels like an uncommon.

Spell Casting Prodigy: Completely busted in Modern/Commander. Repeater Reverberate on a stick with no tap or timing restriction. Needs summoning sickness/tap or 3–4 mana per copy.

Contemplate the Cosmos: Extremely dangerous. Four cards plus pseudo-Time Stop for 1 mana is too efficient; should be 3–4 mana or draw three.

Soul Extraction: Fine, basically slightly improved Hero’s Downfall style rate; feels okay as rare.

Polymorph Other: Untapping five lands plus exile for 5 is broken mana-wise. That’s essentially free or better. Lose the untap or cost 6–7.

Power Word: Kill: Very weak for mythic; super conditional removal. Could be common and instant-speed “if it was dealt damage” like Blood Feud variants.

Punish: White Condemn without lifegain and timing restriction; okay card but not mythic-level at all.

Tackle Dummy: Zero-mana wall with protection from creatures is abusable with equipment, auras, and skullclamp-type stuff. Needs at least 1–2 mana or downside.

Gate: Totally broken in Commander. Free pregame Companion-style effect plus Tooth and Nail from sideboard at 4 mana and one random discard. Needs to lose the pregame clause or be much more restrictive on what it can fetch, or cost 7–8.

Most of these would be wild in Modern and pretty warping in Commander without serious tuning. 🎨🃏