Shiva has been a mainstay of the Final Fantasy series as the ice elemental summon for years, starting with the very first game to feature summons in Final Fantasy III
While some players prefer Yuna, Hope of Spira as a summoner, shes more expensive to bring onto the field and can only bring back one spent Enchantment from the graveyard
With the current context in mind, this card will play an unfilled role
There are plenty of ways to make it so you have either drawn your entire deck or self-milled yourself, with the final entry on this list a fantastic way to set up this win condition
If you want to go the creature route, Metalwork Colossus, Phyrexian Triniform, Platinum Emperion, and Inkwell Leviathan are all top-notch powerhouses that Sharuum can drop on the field to establish an instant board presence
Theres a downside, of course, but notably it doesnt come in the form of an additional casting cost