Dont worry too much about buffing its power for more expensive taxes: it turns out a Rhystic Study that can only trigger once per turn per opponent on noncreature spells is still pretty good
The List is curated for each set, and contains cards from across Magics history
Many players have been taken down by a single Blightsteel hit, often with haste from Lightning Greaves or some other pair of boots, and the lesson becomes infect bad. The entire mechanic is doomed to be punished for the sins of three or four one-shot cards like this
This can be an amazingly effective strategy and particularly appeals to players who enjoy playing long, and oftentimes complex, games
Similarly, each time a Horror creature, Nightmare creature, enchantment creature, or face-down creature you control attacks an opponent, that opponent become afraid of you for the rest of the turn, regardless of what happens to the creature that attacked