Paradise Druid

This creature has hexproof as long as it's untapped. (It can't be the target of spells or abilities your opponents control.)
{T}: Add one mana of any color.

Beastcaller Savant

Haste
{T}: Add one mana of any color. Spend this mana only to cast a creature spell.

Llanowar Elves

Elvish Mystic

Spider Manifestation

Reach
{T}: Add {R} or {G}.
Whenever you cast a spell with mana value 4 or greater, untap this creature.

Arbor Elf

Elves of Deep Shadow

{T}: Add {B}. This creature deals 1 damage to you.

Somberwald Sage

{T}: Add three mana of any one color. Spend this mana only to cast creature spells.

Zhur-Taa Druid

{T}: Add {G}.
Whenever you tap this creature for mana, it deals 1 damage to each opponent.

Fyndhorn Elves

Llanowar Tribe

Bloom Tender

Vivid — {T}: For each color among permanents you control, add one mana of that color.