Chapter III in particular makes attacking feed you cards, so sometimes Shiva plays out like two turns of Moat. You can also try to combine this with other stun effects to draw extra cards, though there arent many of those (mostly just Ice Flan and Omega, Heartless Evolution)
Some have stipulations, and the ones without are usually undersized creatures
The decks other legendary creature doesnt have a whole lot to do with face-down creatures, but shes certainly strong
Youre being hindered right now, but youre not completely out of the game
Mystic Snake was often a way to do damage to an opponent who you otherwise couldn't find an opening to get a threat down against or a two-for-one by fighting one of the many bears that were in decks in those days, and when it did these things it was good
Luckily, with the recent printing of Millicent, Restless Revenant, it's looking like Azorius Spirit-Tribal decks are finally going to be able to come into their own