Forest

Have

Lotus Cobra

Landfall — Whenever a land you control enters, add one mana of any color.

Swamp

Reflecting Pool

{T}: Add one mana of any type that a land you control could produce.

Need for Speed

Sacrifice a land: Target creature gains haste until end of turn.

Aesi, Tyrant of Gyre Strait

You may play an additional land on each of your turns.
Landfall — Whenever a land you control enters, you may draw a card.

Rafiq of the Many

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
Whenever a creature you control attacks alone, it gains double strike until end of turn.

Island

Mountain

Fabled Passage

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.

Getting

Progenitus

Protection from everything
If Progenitus would be put into a graveyard from anywhere, reveal Progenitus and shuffle it into its owner's library instead.

Plains

Azusa, Lost but Seeking

You may play two additional lands on each of your turns.

Command Tower

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

Finest Hour

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
Whenever a creature you control attacks alone, if it's the first combat phase of the turn, untap that creature. After this phase, there is an additional combat phase.