Setessan Skirmisher
Creature — Human Warrior
Constellation — Whenever an enchantment you control enters, this creature gets +1/+1 until end of turn.
Bassara, the tower of the fox, houses the elite skirmishers who guard the Nessian Wood against trespassers.
Greg Staples
Theros Beyond Death (THB)
• #200Rulings
A constellation ability triggers whenever an enchantment enters the battlefield under your control for any reason. Enchantments with other card types, such as enchantment creatures, will also cause constellation abilities to trigger.
(wotc • 2020-01-24)
An Aura spell that has an illegal target when it tries to resolve doesn’t resolve and is instead put into its owner’s graveyard. It doesn’t enter the battlefield, so constellation abilities don’t trigger.
(wotc • 2020-01-24)
Rulings
A constellation ability triggers whenever an enchantment enters the battlefield under your control for any reason. Enchantments with other card types, such as enchantment creatures, will also cause constellation abilities to trigger.
(wotc • 2020-01-24)
An Aura spell that has an illegal target when it tries to resolve doesn’t resolve and is instead put into its owner’s graveyard. It doesn’t enter the battlefield, so constellation abilities don’t trigger.
(wotc • 2020-01-24)