This keyword is found on certain creature cards, allowing players to place a +1/+1 counter on that creature if/when they cast a spell, the amount of mana spent to cast that spell is greater than the power or toughness of the creature with increment
It's an actual incentive to build a critter-based deck in the first place
It creates a massive deterrent against spot removal, forcing your enemies to either leave your dragons alone or risk losing their best resources
While it's not a permanent solution, it is certainly a frustrating one
#3 Surge Foil Box Toppers These are all put in one category for two reasons: they are exceptionally rare, available in less than 1% of booster packs, and listing them out would take up the entire list, omitting some of the easier, yet valuable, cards you can find in your boxes
The card game industry tends to shift a lot, but some restrictions stay the same from when they were implemented