But the Key had done its work. The Dreadnought charged.

. Creatures with Shadow can only be blocked by other creatures with Shadow. Unless you are playing against a dedicated Dauthi deck, your creature will never be blocked. Sun Quan, Lord of Wu: Horsemanship

Almost guaranteed unblockable in Commander due to opponents playing nonbasic lands. Best Passive/Low-Cost Enablers

A land that can be tapped to make a creature unblockable, ideal for late-game unblockable damage.

: The ultimate "free" inclusion in most decks. Because it is a land, it doesn't take up a spell slot, and its activated ability can turn any of your creatures into an unstoppable threat at a moment's notice.

The efficiency of an unblockable enabler is often measured by its mana cost, permanency, and secondary benefits.