The Undying

The Undying can't block.

If The Undying would be destroyed, it phases out
instead and gains +1/+1. (While it’s phased out, it’s
treated as though it doesn’t exist. It phases in before
its controller untaps during their next untap step.)

The old martyr remembered rallying his
comrades to their doom. But it had been years
since he could remember why...