Thrainum Omaga

Flying, Hexproof. Can't be countered.
At the beginning of your upkeep draw two cards.
For each card draw this way each opponent takes
2 damage and discards a card.
If Thrainum, Omega leaves the battlefield all
players shuffle all non-land cards on the battlefield, cards in hand and graveyards into their libraries then draws 9 cards and untaps 9 lands.
Do you believe me The End or Beginning?