Poison Blade Prowler

Deathtouch, first strike, lifelink.
If Poison Blade Prowler is blocked by more then one creature, you may sacrifice a creature, then Poison Blade Prowler gains Indestructible and "this creature deals damage to other creatures in the form of -1/-1 counters." and losses Deathtouch.
"Not much is known about the prowler, but don't go digging for information, or you might end up being their next victim."