Marina, Princess of Sunflowers

If exactly 1 other Plant-Type monster you control (and no other cards) is destroyed by battle or by card effect and sent to the Graveyard: You can target 1 card your opponent controls; destroy that target. This card must be face-up on the field to activate and to resolve this effect.

From Yu-Gi-Oh! Trading Card Game.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6nqfyw3y7esb1i7n2ut5rp.