Though banned in Commander, Iona remains a strong inclusion in other formats where grifting big creatures into play is viable
Id slightly prefer the sixth willpower of Rabbit over the fifth strength of Virina, but theyre no match for the legendary
It is also a little less proactive than some alternatives but that is only a downside for the more aggressive builds
Fractured Sanity is another good option, even though it only mills fourteen cards since, in a pinch, it can be cycled away to draw cards
This card could very well have multi-format potential, at least as a sideboard option, disabling everything from Llanowar Elves to Yawgmoth, Thran Physician
Cait Sith, Fortune Teller gives you that effect in general to whatever creature you like and throws in a cheeky scry as well for your trouble