KanjiJLPT N1
Raise

raise, plan, project, behavior, actions

Mnemonic

When you summon a spirit, you must raise your hand high into the air. The higher you raise your hand, the more powerful the entity you summon. Feel your arm trembling as otherworldly energy courses through your raised palm, crackling with light.
Additional thoughts
Picture a dark ritual circle — the act of raising your hand IS the summoning gesture. Hand up = summon complete. The two actions are fused into one dramatic motion.
Quick recall
Summon a spirit by lifting your hand — to raise it is to call forth power.

Details

The keyword for 挙 is raise. This kanji conveys the idea of lifting something up, whether physically raising one's hand or figuratively bringing something forward for consideration. It is closely associated with the act of raising one's hand in a vote or nomination, and by extension it carries meanings related to undertaking an action, citing examples, or enumerating items. The sense of elevating or putting forth is central to all its uses.
On'yomi
きょ
Kun'yomi
あ.げる、あ.がる、こぞ.る