Explore

You may play an additional land this turn.
Draw a card.

Rootbound Crag

Rootbound Crag enters tapped unless you control a Mountain or a Forest.
{T}: Add {R} or {G}.

Mountain

Defense Grid

Each spell costs {3} more to cast except during its controller's turn.

Explorer's Cache

Explorer's Cache enters with two +1/+1 counters on it.
Whenever a creature you control with a +1/+1 counter on it dies, put a +1/+1 counter on Explorer's Cache.
{T}: Move a +1/+1 counter from Explorer's Cache onto target creature. Activate only as a sorcery.

Sol Ring

Borborygmos Enraged

Trample
Whenever Borborygmos Enraged deals combat damage to a player, reveal the top three cards of your library. Put all land cards revealed this way into your hand and the rest into your graveyard.
Discard a land card: Borborygmos Enraged deals 3 damage to any target.

Arcane Signet

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

Forest

Azusa, Lost but Seeking

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

Reliquary Tower

You have no maximum hand size.
{T}: Add {C}.