The Wizard's Portal of Power

Prompt:  Illustrate a dramatic scene featuring a powerful wizard standing before a colossal, ancient portal. The wizard should have a commanding presence, with a long beard, a tall pointed hat, and a staff crackling with magical power. The portal itself should be made of ancient stone, covered in moss and vines, with glowing runes and a shimmering, ethereal surface. The scene should convey a sense of awe and timelessness, with the wizard preparing to either open or pass through the portal, bathed in an eerie, otherworldly light.