It is removed from the game and placed into the exile zone, where it loses all memory of its former state (any damage incurred that turn, enchantments, counters, equipment, whether it was the target of any spell or ability, and any other effect)
Check the number of artifacts you control as the ability resolves, including the Treasure token you just created, to see if you can cast the exiled card without paying its mana cost
Eldrazi typically do not draw cards directly
MTG players already use dice regularly, be it a spindown counter, a die to roll and see who goes first, or even d6s to register +1/+1 counters or loyalty counters
Eldraines inherently enchanting plane will appropriately be represented by a bonus sheet of Enchantment cards, according to information dropped by publisher Wizards of the Coast at the recent Pro Tour Barcelona