In this situation, I only lose if my opponents can remove the card or effect that prevents me from losing, or in some cases, if they can win via an alternate wincon
while the card had seen appreciation in value, I think it was a clear case of a small subset of buyers creating irrational marketplace conditions that led to some serious FOMO on collectors who were sitting on a bit of a lull in terms of what was happening in the marketplace at the turn of the year
Buylist Payout Guide (Foil Cards) Exact payout may vary by card demand, rarity, and severity of wear.
If some of the attacking creatures leave the battlefield while Mangara's triggered ability is on the stack, use the player or planeswalker they were attacking before they left to determine whether you draw a card
Seriously though, you have to let your opponent actually connect, then remove the creatures only to have them return when your opponent inevitably kills Hixus