Nibbit Shank,

when Nibbit Shank, "Collector" enters the battle field, create two trash tokens. (a trash
token is an artifact token with no effects.)
{4}{t}exchange target artifact you control and target non land permanent another player controls for as long as Nibbit Shank, "collector" is on the battlefield

Stress- If you control no artifacts, return Nibbit Shank, "Collector" to your hand
from the battlefield