Forum:Hieratic summoning vs Obelisk the Tormentor

Hi I've got a simple ruling query that I've been wondering about for a while.

When you tribute any of three Hieratic Dragons like Gebeb, Nebthet, Su, etc. for Obelisk the Tormentor can the effect of these dragons still activate after he's been summoned--Eternumblaze (talk • contribs) 19:02, July 28, 2013 (UTC)?