Orb of Silt¶
<ongoing> When casting a <spell> from the School of Earth Magic, double the <power> used for this spell.
— OR —
<instant> When casting a Earth Magic <spell>, Remove this card to gain +5 <power>.
You come across a conjurer who begs to accompany you and your army awhile for safety. You agree, and he offers as payment a strange orb of the elements.