If you can tap a creature for more than three mana, Sword Of The Paruns attached to it will always generate infinite mana at instant speed as you can keep untapping and tapping it for mana to use for Sword Of The Paruns' untap effect
While its less true than it used to be (thanks to FIRE design, cards designed for Best of 1, and increased modality/card draw in general), its still a key part of gameplay and it feels like what this mechanic, and in particular, gifting a card, was designed around
The rules of the game have morphed and grown in complexity
What do you think of these cards
Product Details Flying Whenever one or more creatures deal combat damage to you, each opponent sacrifices a creature that dealt combat damage to you this turn
Since this happens in real life, the virtal challenge should not be any different