The Cooler Mordenkainen’s Faithful Hound

You conjure a phantom hound in an unoccupied space that you can see within range, and choose one of the following two forms:

• Watchdog: The hound you conjure is invisible to all creatures except you and can't be harmed. It remains in the place it was summoned for 8 hours unless you dismiss it as an action, or until you move more than 100 feet away from it. When any creature comes within 30 feet of it without first speaking the password that you specify when you cast this spell, the hound starts barking loudly. The hound sees invisible creatures and can see into the Ethereal Plane. It ignores illusions and cannot be blinded. At the start of each of your turns, the hound attempts to bite one creature within 5 feet of it that is hostile to you. The hound's attack bonus is equal to your spellcasting ability modifier + your proficiency bonus. On a hit, it deals piercing damage equal to 4d8 + the spell's level. Starting with the round in which it attacks first, it will only remain for the next minute, unless the duration of the spell ends before that point.
• Bloodhound: The hound acts as a summoned creature in combat and uses the statblock below. It lasts for the duration of the spell, can move freely, and remains for one hour unless its hit points are reduced to zero, you dismiss it as a bonus action, or you or it move more than 1 mile away from the other. It shares your initiative count, but takes its turn after you. It obeys your commands (no action required); if none are given, it will defend you, defend creatures you designate as allies when you summon it, and pursue hostile creatures within its sight or range of smell and hearing, its priorities in that order.