Played at the beginning of this player's turn, this card is not discarded. It affects all players and remains in effect until another rule card is played. All events, spells, and psionic powers that cause the razing/discarding of realms outside of combat now come with a cost. To play the spell, event, or psionic power card, a card of the same type must also be discarded from hand. If the player can not discard a card of the same type, the initial card can not be played.
Copyrights:
TSR
Wizards of the Coast
This rule card looks incredibly nasty, but is suprisingly weak in many games. While in play, this rule card doesn't even restrict realm razing or destroying cards (events, spells, and psionic power cards specifically) outside of combat.
Instead, a card must be discarded to make that card work. This is not that big of a cost for the results. However, the card has to be discarded when the card is played, so countering the card does not remove the sacrifice cost.