Grul-Canix, the Bountiful

Constellation—Whenever Grul-Canix, the
Bountiful or another enchantment enters the battlefield under your control, Bolster 2.
Bestow {7}{g}(If you cast this card for its bestow cost
it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature)
Enchanted creature gets +3/+3 and has Constellation