Swiftfoot Boots

Equipped creature has hexproof and haste. (It can't be the target of spells or abilities your opponents control. It can attack and {T} no matter when it came under your control.)
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)

Forest

Zaxara, the Exemplary

Deathtouch
{T}: Add two mana of any one color.
Whenever you cast a spell with {X} in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it.

Sol Ring

Island

Swamp

Command Tower

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

Arcane Signet

Thought Vessel

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

Opulent Palace

Opulent Palace enters tapped.
{T}: Add {B}, {G}, or {U}.