Commander's Sphere

{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.

Island

Mana Geode

When Mana Geode enters, scry 1.
{T}: Add one mana of any color.

Prime Speaker Zegana

Prime Speaker Zegana enters with X +1/+1 counters on it, where X is the greatest power among other creatures you control.
When Prime Speaker Zegana enters, draw cards equal to its power.

Sky Diamond

Moss Diamond

Moss Diamond enters tapped.
{T}: Add {G}.