Llanowar Elves

Collector Ouphe

Activated abilities of artifacts can't be activated.

Fyndhorn Elves

Mox Amber

{T}: Add one mana of any color among legendary creatures and planeswalkers you control.

Arbor Elf

Priest of Titania

{T}: Add {G} for each Elf on the battlefield.

Avacyn's Pilgrim

Rhys the Redeemed

{2}{G/W}, {T}: Create a 1/1 green and white Elf Warrior creature token.
{4}{G/W}{G/W}, {T}: For each creature token you control, create a token that's a copy of that creature.

Selesnya Signet

Arcane Signet

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

Boreal Druid

Timberwatch Elf

{T}: Target creature gets +X/+X until end of turn, where X is the number of Elves on the battlefield.

Sol Ring

Elvish Promenade

Create a 1/1 green Elf Warrior creature token for each Elf you control.