Phyrexian Dreadnought + Greater Good

[Tourach]

Brewing question:

I have a Greater Good in play. I cast Phyrexian Dreadnought , it resolves and I put its ETB ability on the stack. Can I sac the Dreadnought to Greater Good before I have to sac 12+ power?

[Reeplcheep]

Yes this works, you have an opportunity to respond to the etb just like with stifle.

Greater good also draws your deck with ominous seas

If you somehow were able to put two dreadnoughts into play at the same time, you could sac one to the other.

[Tourach]

Thank you, Reeplcheep!

[Reeplcheep]

Thank you, Reeplcheep!

An existing brew if you want some inspiration is this one Phil Gallagher streamed: (http://www.thrabenuniversity.com/?p=2519)

Take out oko or astrolabe for dreadnought (you can do the same trick with uro)