What attacks can I block with the Guard Up Skill that I normally coudn't?

Beam or gas attacks are normally unblockable, but can be blocked with Guard Up. This includes:

• Pukei-Pukei's poison cloud
• Radobaan's and Uragaan's sleep clouds
• Uragaan's fire cloud
• Kirin's lightning attack that hits a long area across the ground
• Teostra's supernova
• Vaal Hazak's beam attacks
• Xeno'jiiva's beam attacks
• Kulve Taroth's lingering fire pools
• Lunastra's fire puddles igniting from a different fire attack
• Behemoth's ground shockwave

Additionally, some attacks can not be blocked even with Guard Up, such as:

• Behemoth's horn impale
• Behemoth's Ecliptic Meteor
• Ancient Leshen's "bird nova", the attack that sends out Revoltures in all directions after charging up