Amphibious. The giant can breathe air and water.

Multiattack. The giant makes two attacks, using Storm Sword or Thunderbolt in any combination.

Storm Sword. Melee Attack Roll: +14, reach 10 ft. Hit: 23 (4d6 + 9) Slashing damage plus 13 (3d8) Lightning damage.

Thunderbolt. Ranged Attack Roll: +14, range 500 ft. Hit: 22 (2d12 + 9) Lightning damage, and the target has the Blinded and Deafened conditions until the start of the giant's next turn.

Lightning Storm (Recharge 5–6). Dexterity Saving Throw: DC 18, each creature in a 10-foot-radius, 40-foot-high Cylinder originating from a point the giant can see within 500 feet. Failure: 55 (10d10) Lightning damage. Success: Half damage.

Spellcasting. The giant casts one of the following spells, requiring no Material components and using Wisdom as the spellcasting ability (spell save DC 18): At Will: Detect Magic, Light. 1/Day: Control Weather