Shoal Kraken
Creature — Kraken
Constellation — Whenever an enchantment you control enters, you may draw a card. If you do, discard a card.
It eats the things that eat the things that are drawn to the light.
Vincent Proce
Rulings
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)
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)
Rulings
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)
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)