Gavin notes that there are downsides to Cranial Ram - such as the restrictive casting cost and less efficient equip cost
1 Savai Crystal
If white is only a splash color, I would also expect the land selection to be mostly or entirely blue ideally you can get all your white mana from two-color lands like Hallowed Fountain, so you dont need to play any white-mana-only sources that cant cast the majority of your spells
Its just a 1/1 dog, but when the moment comes, it gives its life to protect one of your other creatures, making that target indestructible until end of turn
For each card of the chosen color exiled this way, create a 1/1 blue and black Faerie Rogue creature token with flying. Its incredibly against mono-colored decks, so thats well worth considering
Ugin is the least impressive against some of the grindier decks, but it still a strong enough threat that must be answered