Forest

Svella, Ice Shaper

{3}, {T}: Create a colorless snow artifact token named Icy Manalith with "{T}: Add one mana of any color."
{6}{R}{G}, {T}: Look at the top four cards of your library. You may cast a spell from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.

Mountain

Seedborn Muse

Untap all permanents you control during each other player's untap step.

Seeker of Skybreak

Magewright's Stone

{1}, {T}: Untap target creature that has an activated ability with {T} in its cost.

Great Oak Guardian

Flash (You may cast this spell any time you could cast an instant.)
Reach
When Great Oak Guardian enters the battlefield, creatures target player controls get +2/+2 until end of turn. Untap them.

Second Harvest

For each token you control, create a token that's a copy of that permanent.

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