Ravenous Squirrel

Whenever you sacrifice an artifact or creature, put a +1/+1 counter on Ravenous Squirrel.
, Sacrifice an artifact or creature: You gain 1 life and draw a card.

Biomass Mutation

Creatures you control have base power and toughness X/X until end of turn.

Charmbreaker Devils

At the beginning of your upkeep, return an instant or sorcery card at random from your graveyard to your hand.
Whenever you cast an instant or sorcery spell, Charmbreaker Devils gets +4/+0 until end of turn.

Ponder

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Aetherspouts

For each attacking creature, its owner puts it on their choice of the top or bottom of their library.

Daretti, Scrap Savant

+2: Discard up to two cards, then draw that many cards.
−2: Sacrifice an artifact. If you do, return target artifact card from your graveyard to the battlefield.
−10: You get an emblem with “Whenever an artifact is put into your graveyard from the battlefield, return that card to the battlefield at the beginning of the next end step.”
Daretti, Scrap Savant can be your commander.

Karok Wrangler

Magecraft — Whenever you cast or copy an instant or sorcery spell, put a +1/+1 counter on target creature you control.

Whale

When this creature dies, create a 9/9 blue Kraken creature token.

Epic Experiment

Exile the top X cards of your library. You may cast instant and sorcery spells with mana value X or less from among them without paying their mana costs. Then put all cards exiled this way that weren’t cast into your graveyard.

Biomass Mutation

Creatures you control have base power and toughness X/X until end of turn.

Pilgrim’s Eye

Flying
When Pilgrim’s Eye enters, you may search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Fish

When this creature dies, create a 6/6 blue Whale creature token with “When this creature dies, create a 9/9 blue Kraken creature token.”

Nissa’s Expedition

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature’s color.)
Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Reef Worm

When Reef Worm dies, create a 3/3 blue Fish creature token with “When this creature dies, create a 6/6 blue Whale creature token with ‘When this creature dies, create a 9/9 blue Kraken creature token.'”

Arcane Signet

: Add one mana of any color in your commander’s color identity.

Terramorphic Expanse

, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Repeal

Return target nonland permanent with mana value X to its owner’s hand.
Draw a card.

Akroma’s Memorial

Creatures you control have flying, first strike, vigilance, trample, haste, and protection from black and from red.

Lightning Axe

As an additional cost to cast this spell, discard a card or pay .
Lightning Axe deals 5 damage to target creature.

Ponder

Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.

Ninja of the Deep Hours

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Ninja of the Deep Hours deals combat damage to a player, you may draw a card.

Reiterate

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Copy target instant or sorcery spell. You may choose new targets for the copy.

Epic Experiment

Exile the top X cards of your library. You may cast instant and sorcery spells with mana value X or less from among them without paying their mana costs. Then put all cards exiled this way that weren’t cast into your graveyard.