How Does Mobilize Work In Magic: The Gathering
The cards popularity is reflected in its pricing
For regular upgrades I highly recommend: Vito, Thorn of the Dusk Rose, Mondrak, Glory Dominus, Anointed Procession, Parallel Lives, Eerie Ultimatum, and you can also run the Cat Oven combo with Cauldron Familiar + Witch's Oven + Clock of Omens, and there's the Ballista Combo Heliod, Sun-Crowned + Walking Ballista, and finally the Exquisite Blood Combo since the deck already runs the other piece Sanguine Bond One Down, Three to Go
There are so many ways to make creatures unblockable when playing Dimir, so this effect is easily repeatable
Honorable Mentions Iona, Shield of Emeria Iona, Shield of Emeria is powerful enough that the Commander Rules Committee has opted to ban it, so you cant have Iona as your commander