Harmonic Sliver

Creature — Sliver

All Slivers have "When this permanent enters the battlefield, destroy target artifact or enchantment."

1/1

2013-07-01:
Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn’t provide any additional benefit.
2013-07-01:
If the creature type of a Sliver changes so it’s no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.
2021-03-19:
The ability Harmonic Sliver grants itself triggers when it enters the battlefield.
2021-03-19:
The controller of the Sliver that enters the battlefield controls the triggered ability for that Sliver and chooses what to destroy, not necessarily the controller of Harmonic Sliver.