Avatar: The Last Airbender Eternal

Instant

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Mystical Tutor

Search your library for a card, put that card into your graveyard, then shuffle.

Entomb

Search your library for a creature card, reveal it, then shuffle and put the card on top.

Worldly Tutor

Artifact

{T}: Add one mana of any color in your commander's color identity.

Arcane Signet

Avatar: The Last Airbender

Creature — Human Scout Ally

Each land and Ally you control has "{T}: Add one mana of any color."

Great Divide Guide

Legendary Creature — Avatar Spirit Ally

Reach, trample
Whenever Aang and La attack, put a +1/+1 counter on each tapped creature you control.

Aang and La, Ocean's Fury

Legendary Creature — Human Avatar Ally

Flash
Flying
When Aang enters, airbend up to one other target creature or spell. (Exile it. While it's exiled, its owner may cast it for {2} rather than its mana cost.)
Waterbend {8}: Transform Aang.