Using a combo from Erzengel, which is the {shrieking drake}, {silver myr}, and {intruder alarm}.
Adding into it the cards {prodigal sorcerer} or a {psionic entity} with an {armadillo Cloak}, a {basilisk collar} and {adarkar Valkyrie}.
Run the drake/ myr cycle to untap all creatures, using this to continually activate the pinger with death touch, then using the Valkyrie to retrieve the creatures killed by the pinger into play on your side.
If you put a {Thornbite Staff} on the valkyrie and put the {Basilisk Collar} on a {Goblin Sharpshooter} the combo would function identically without needing any of the other cards.
I don't think pinging is considered combat damage since it never actually entered combat
Deathtouch applies to noncombat as well as combat damage