Its expensive and not an enchantment creature for some reason, but this ability isnt terrible in Enchantress decks that can quickly drop a lot of cheap enchantments
Either way, those decks are very different from the traditional mill archetype, so I wont be talking about those cards
Caesar hits so many favorites for me: hes inexpensive, hes got a decent power and toughness, and with a little sacrifice, he becomes a problem quickly while doing everything that Soldiers wants to do, make more Soldiers and deal damage
My suggestion was a Coat of Arms for Slivers
Wither on damage to creatures matters more than it first appears
Thats not always a given for green decks, so I imagine Synchronization will be very good in some shells, though worse on average than Cultivate