Chromatic Lantern

Lands you control have "{T}: Add one mana of any color."
{T}: Add one mana of any color.

Command Tower

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

Mountain

Sythis, Harvest's Hand

Whenever you cast an enchantment spell, you gain 1 life and draw a card.

Farseek

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Jukai Naturalist

Lifelink
Enchantment spells you cast cost {1} less to cast.

Swamp

Plains

Three Visits

Search your library for a Forest card, put it onto the battlefield, then shuffle.

Arcane Signet

Forest

Island

Esper Terra

(As this Saga enters and after your draw step, add a lore counter.)
I, II, III — Create a token that's a copy of target nonlegendary enchantment you control. It gains haste. If it's a Saga, put up to three lore counters on it. Sacrifice it at the beginning of your next end step.
IV — Add {W}{W}, {U}{U}, {B}{B}, {R}{R}, and {G}{G}. Exile Esper Terra, then return it to the battlefield (front face up).
Flying

Terra, Magical Adept

When Terra enters, mill five cards. Put up to one enchantment card milled this way into your hand.
Trance — {4}{R}{G}, {T}: Exile Terra, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery.

Terra, Magical Adept // Esper Terra

Nature's Lore

Search your library for a Forest card, put that card onto the battlefield, then shuffle.