This deck runs a lot of bizarre cards, and they can all target your own permanents so Orvar can copy them
Who does he think he is
Excess damage spills over onto the second blocker, and so on, until all the damage is used up, or all the blockers have taken damage equal to at least their toughness
2015 - Goblin Sleigh Ride Goblin Sleigh Ride is an obvious reference to sleighs, which is frequently referenced in many Christmas media
Walk the Aeons + Mystic Sanctuary + Trade Routes (or Meloku the Clouded Mirror) This also results in infinite turns, but compared to the one above, it carries less risk if countered, and you can try again as many times as you like with Mystic Sanctuary, so it has a nasty quality where you will eventually enter infinite turns unless your opponent has a radical countermeasure
I'd be crucified if I turned a precon upgrade guide into a combo deck so Bartolome is out next