Scuttlemutt

{T}: Add one mana of any color.
{T}: Target creature becomes the color or colors of your choice until end of turn.

Suq'Ata Firewalker

Suq'Ata Firewalker can't be the target of red spells or abilities from red sources.
{T}: Suq'Ata Firewalker deals 1 damage to any target.

Willbreaker

Whenever a creature an opponent controls becomes the target of a spell or ability you control, gain control of that creature for as long as you control Willbreaker.

Distorting Lens

{T}: Target permanent becomes the color of your choice until end of turn.

Blue Elemental Blast

Choose one —
• Counter target red spell.
• Destroy target red permanent.

Vodalian Mystic

{T}: Target instant or sorcery spell becomes the color of your choice.

Cerulean Drake

Flying
Protection from red (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything red.)
Sacrifice Cerulean Drake: Counter target spell that targets you.

Treetop Sentinel

Coast Watcher

Narwhal

Insight

Whenever an opponent casts a green spell, you draw a card.

Cerulean Wyvern

Blind Seer

{1}{U}: Target spell or permanent becomes the color of your choice until end of turn.

Weatherseed Faeries

Douse

King Crab

{1}{U}, {T}: Put target green creature on top of its owner's library.

Aether Gust

Choose target spell or permanent that's red or green. Its owner puts it on their choice of the top or bottom of their library.