Esper Sentinel
{W}
Artifact Creature — Human Soldier
Oracle Text
Whenever an opponent casts their first noncreature spell each turn, draw a card unless that player pays {X}, where X is this creature's power.
Watch Out
Only triggers on the first noncreature spell each turnWatch Out
Esper Sentinel triggers only on the FIRST noncreature spell each opponent casts each turn, not every noncreature spell. The tax is based on Esper Sentinel's power when the trigger resolves. Pumping it in response increases the tax.