For example, if a 4/4 creature an opponent controls is dealt 2 damage by a spell you control and later that turn is dealt 3 damage by a spell another player controls, Aegar's ability will trigger
Unlike most counterspells, it is not purely reactive you can use this card as an instant speed mana sink in the opponents end step to generate a huge threat, or as a combat trick to force through sudden lethal damage after blocks are declared
You can win real rewards through these events by selling the prizes you get, so if thats something that appeals to you then this is a great way to play the format
Graded Population Report: Lugia [1st Edition] #9 Visualize the distrbution of grades in the chart
In a Two-Headed Giant game, Campaign of Vengeances triggered ability has one defending player of your choice lose 1 life
Kor Skyfisher + Fear of Isolation Cards like Kor Skyfisher and Fear of Isolation have a downside of having to return another permanent you control to your hand