OK, first, a new piece that doesn't fit the requested criteria, but I was toying with Pathed Leap (but I wanted the Trigger, which of course makes it no longer symmetrical LeGasp!):

Minion unit I originally came up with for this contest:

Champion unit I kind of came up with for this contest, but also because I was reading about someone complaining about turtling set-ups:

Champion I absolutely didn't come up with for this contest, but I'm putting it here anyway, because it's a penguin overlord: