How strong are these custom Baldur’s Gate 2 cards in Commander?

The first two are remakes of past cards. All of these are based on Baldur's Gate 2

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Chain Contingency 8WW

Sorcery - Mythic

Search your Library for up to three non-land cards, each having Mana Value 8 or less, reveal them, and exile them face-up. Shuffle your Library. Until end of turn, you may cast those exiled spells without paying their mana costs.

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Joneleth Irenicus, Shattered One 1RBU

Legendary Creature - Wizard Elf - Mythic

When you cast a spell, if you paid its mana cost, you may cast your next spell of lower mana value without paying its mana cost.

3/3

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Nalia, Royal Urchin UWG

Legendary Creature - Noble Thief - Mythic

Protection from Red.

When Nalia attacks or blocks, create a Treasure token.

Nalia gains +1/+1 for each Treasure you control.

3/3

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Jahiera, Nature's Fury RGW

Legendary Creature - Druid Elf - Mythic

When a Druid or Elf is tapped for Mana, add an additional one mana of the same type to your Mana Pool.

When Jahiera attacks or blocks, create a Food token.

When you sacrifice a Food token, Jahiera deals 3 damage to target creature or player.

3/3

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Elminster, The Wise BUW

Legendary Creature - Wizard - Mythic

When Elminster attacks or blocks, create a Clue.

When you control Ten or more Clues, you win the game.

3/3

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Book of Infinite Spells 5

Legendary Artifact - Mythic

Book of Infinite Spells Enters Tapped and does not untap during your Untap Step.

You have no maximum hand size.

T: The next time you cast an instant or sorcery card from your hand, return that card to your hand as the last step of its resolution instead of putting it into the Graveyard.

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Spell Trap 8UU

Enchantment - Mythic

Split-Second.

Spell Trap enters with three Absorb counters on it. When there are no Absorb counters on Spell Trap, sacrifice it.

Remove an Absorb counter: Counter target spell.

How strong are these custom Baldur’s Gate 2 cards in Commander?
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