I also advocate foils above nonfoils in this plan
Green heavily rewards you for playing big creatures, often in card advantage through cards like Garruk's Packleader and Vaultborn Tyrant
You could play a Cori-Steel Cutter, then cast a one-mana spell like Boltwave, Cut Down, Hired Claw, or Stormchasers Talent to trigger it and make you an additional token
The Ur-Dragon itself is a nine mana WURBG 10/10 Dragon with flying
Most instances of explore are found on creature cards, but MTG designers often find clever ways to get the most out of a mechanic, so youll see sorceries that let creatures explore, or vehicles that make the creature crewing them explore
In particular, vigilance is essential to maintain Ojutai's hexproof, and double strike doesn't just double the Commander damage