Esper Sentinel

Whenever an opponent casts their first noncreature
spell each turn, draw a card unless that player pays
Variable Colorless, where X is Esper Sentinel's
power.
In the heart of the ancient city of Minas Tirith stood
a small unit of guards, resolute and vigilant, like a
steadfast pillar of Gondorian valour. Clad in
gleaming armour, they stood beside the long thought
dead White Tree of Gondor, a symbol of a thriving
bygone era, and an emblem of lingering hope, awaiting
the return of their k