The dark, spikey plant fruit on the right of this card's artwork looks similar to a grenade. The word grenade also comes from the French word for the pomegranate fruit.
"Necro Fleur" may be an "undead" version of this monster.
Both cards are also Level 1 DARK-AttributePlant-Type monsters with similar ATK and DEF. They also have a similar appearance, have effects that involve leaving the Field and have mirrored poses of each other ("Evil Thorn"'s plant "fruit" is hanging to the right of the plant's stem, whereas "Necro Fleur"'s "fruit" is hanging to the left of its stem.)