Note that a creature with Trample that's attacking a Planeswalker cannot trample through that Planeswalker on to the player in control of it, even if the power of the creature exceeds the number of loyalty counters on the Planeswalker
The MH2 cycle has some synergy with Up the Beanstalk
Its energy ability is so good that it sees play outside of energy decks, taking artifact creature and Servo/Thopter decks and throwing routine Robot generation at them
Ajani Japanese Alternate Art Planeswalker Sleeve Code | FNM at Home (expired) - MTGA code to redeem Ajani Japanese Alternate Art Planeswalker Sleeve from FNM at Home
Vohar is small and cheap enough that opponents will likely leave him be, noticing all too late that the gradual advantage he has given you has won you the game
On top of that, you can absolutely pay 0 for x and wipe all artifacts with a mana value of zero, which seems ever more relevant with this years increase in Clue, Food, Map and Treasure tokens