It can support your Active Spot mon by adding an additional 20 DMG off the mill and tearing down the opponent, or go to the Active Spot itself and deal 80 DMG
If you really need to, you can do a bouncing board wipe in a pinch
That leaves you with a chunky Dragon that draws you a card each turn and can untap your entire board, which is plenty to build around honestly
Normally decking out would lose you the game 121.4
Play Rule #13 states: Abilities which refer to other cards owned outside the game (Wishes, Spawnsire, Research, Ring of Ma'ruf) do not function in Commander without prior agreement on their scope from the playgroup. Therefore, Spike is twice banned in Commander, and even if Unstable were allowed, Spike wouldnt be able to be played
What's even more special about this card is how it ties into the lore of Ursula, as she stole Ariel's voice in The Little Mermaid