There are some very big differences between the classic Pokemon TCG rules and those in Pokemon TCG Pocket
This strategy (often referred to as "aristocrats") centers around sacrificing disposable creatures to cast spells, activate abilities, and trigger effects that happen when those creatures die
Upon rotating out of the Standard format, several M2 1 cards increased in value due to gameplay in formats like Pioneer, Commander, and Modern
It is definitely one of the best cards in MTG Modern Horizons 3
Although this loss of life can be costly, Beledros is able to mitigate this loss through the use of pests.
I recently bid in an auction on eBay for these, which ended up at 90+ USD, haha