Three Visits

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

Kaervek, the Spiteful

Collector Ouphe

Activated abilities of artifacts can't be activated.

Natural Affinity

All lands become 2/2 creatures until end of turn. They're still lands.

Arcane Signet

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

Living Plane

All lands are 1/1 creatures that are still lands.

Mycosynth Lattice

All permanents are artifacts in addition to their other types.
All cards that aren't on the battlefield, spells, and permanents are colorless.
Players may spend mana as though it were mana of any color.

Ygra, Eater of All

Ward—Sacrifice a Food.
Other creatures are Food artifacts in addition to their other types and have "{2}, {T}, Sacrifice this permanent: You gain 3 life."
Whenever a Food is put into a graveyard from the battlefield, put two +1/+1 counters on Ygra, Eater of All.

Maha, Its Feathers Night

Flying, trample
Ward—Discard a card.
Creatures your opponents control have base toughness 1.

Night of Souls' Betrayal

Sol Ring

Nature's Revolt

All lands are 2/2 creatures that are still lands.

Karn, the Great Creator

Activated abilities of artifacts your opponents control can't be activated.
+1: Until your next turn, up to one target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value.
−2: You may reveal an artifact card you own from outside the game or choose a face-up artifact card you own in exile. Put that card into your hand.

Farseek

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

Nature's Lore

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