Although Vivi Ornitier has some strong potential as your primary commander, just having Vivi included in your deck can be a massive boon, with plenty of game-ending combos just waiting to be abused
The other key pieces of the puzzle are spells that add mana, like Pyretic Ritual and Manamorphose, since they tick up your storm count higher and higher while not tying up your mana for the turn
This makes the strategy for Ursulas Returns Sapphire/Steel Starter Deck is relatively simple: Play Heroes, win
If you've been imagining your own custom MTG-inspired card as a real object in your hands, Snapshot is the platform that makes that happen
Panorama Lands During the Shards of Alara block, Wizards printed a series of lands called Panoramas
You can also abuse infinite combos, which makes The Gitrog Monster a viable combo deck in cEDH