Arcane Teachings

What this Aura really hands you is a pinger, with a stat boost stapled on as the cost of admission. The +2/+2 is the bribe; the tap ability is the engine, turning whatever creature it lands on into a repeatable source of one damage to face or board. That dual nature is what separated it from the straight-pump Auras of its era: most enchantments of this weight asked you to attack to extract value, and lived in fear of the two-for-one where a single removal spell answers both the Aura and the host. This one promises a payoff that does not require swinging at all. Park it on a creature with reach and you keep the host home as a defensive deterrent while the ability slowly chips away; the tap can fire on either turn, so it doubles as instant-speed reach to snipe an X/1 during your opponent's combat. The catch is that the tap and an attack compete for the same creature: it can do one or the other in a turn, not both, so the host's body and its ability are always trading against each other unless something hands it vigilance. That trade is the whole transaction the card asks you to accept, committing three mana to a creature whose survival you do not control, with no recourse if it dies in response. It belongs in a grinding creature deck where the ability outvalues the tempo loss over a long game and the +2/+2 keeps the host relevant in combat throughout.