how much did the most expensive pokemon card sell for Rarest Pokémon Just Sold An Eye-Watering $4 Million Most Expensive Pokémon Card Auctioned

This card effectively doubles the mana produced by your basic lands in a mono-colored deck

That said, the increase in speed when opponents lose life is a triggered ability, and you can interact with it as such

I especially like swiping commanders with this since changing control doesnt send the commander to the command zone, forcing the impacted player to waste a removal spell on their commander before recasting it

The good indication of this is the initial market price that has been trumped since its reveal

Heat Stroke MTG For three mana, Heat Stroke puts a really awkward restriction on the board, as it strongly discourages players from attacking and blocking