Grand arbiter and X?

[Kaalia with haste]

Does GAAIV make Sphinxs rev work for 2 more or no?

[Gorzo]

 {Grand Arbiter Augustin IV}
{Sphinx's Revelation}

Yes, Augustin's abilities will effectively allow {X} to cost {2} less than whatever number you declare X to be.

For example, if you have a plains, an island, and 4 other lands (untapped), with Augustin on your battlefield, you would be able to cast your {Sphinx's Revalation} with X declared as 6, and be able to pay for it.

[Kaalia with haste]

{Grand Arbiter Augustin IV}
{Sphinx's Revelation}

Yes, Augustin's abilities will effectively allow {X} to cost {2} less than whatever number you declare X to be.

For example, if you have a plains, an island, and 4 other lands (untapped), with Augustin on your battlefield, you would be able to cast your {Sphinx's Revalation} with X declared as 6, and be able to pay for it.

Thanks!