Conclave Naturalists

When Conclave Naturalists enters, you may destroy target artifact or enchantment.

Llanowar Elves

Liquimetal Coating

{T}: Target permanent becomes an artifact in addition to its other types until end of turn.

Indrik Stomphowler

When Indrik Stomphowler enters, destroy target artifact or enchantment.

Forest

Wickerbough Elder

Wickerbough Elder enters with a -1/-1 counter on it.
{G}, Remove a -1/-1 counter from Wickerbough Elder: Destroy target artifact or enchantment.

Harmonize

Reclamation Sage

When this creature enters, you may destroy target artifact or enchantment.

Elvish Mystic

Viridian Shaman

When Viridian Shaman enters, destroy target artifact.

Nature's Claim

Destroy target artifact or enchantment. Its controller gains 4 life.

Splinter

Exile target artifact. Search its controller's graveyard, hand, and library for all cards with the same name as that artifact and exile them. Then that player shuffles.

Manglehorn

When Manglehorn enters, you may destroy target artifact.
Artifacts your opponents control enter tapped.

Field of Ruin

{T}: Add {C}.
{2}, {T}, Sacrifice Field of Ruin: Destroy target nonbasic land an opponent controls. Each player searches their library for a basic land card, puts it onto the battlefield, then shuffles.

Liquimetal Torque

{T}: Add {C}.
{T}: Target nonland permanent becomes an artifact in addition to its other types until end of turn.