jurrac yugioh deck Yu-Gi-Oh! - Velphito (HA03-EN027) - Hidden Arsenal 3-1st Edition During your Main Phase cheap! [Unity Jurrac] 201501 limit

Youre getting your five mana back, statistically speaking, and then theres an enormous payoff for dealing the 7 damage

A Boros Aggro deck headlined by Lightning, Army of One

Relay Soul sounds like a problematic and powerful combination when it can be drawn into, along with you being able to take down the monster, along with your opponent having the incredibly easy scenario of having a monster to Summon, so assuming rulings don't disable it completely (which they could due to the unexplored nature of these effects), I still think it feels wrong to favor it over this

However, mana for an activated ability is pretty steep, so running cards that reduce this cost like Zirda, the Dawnwaker and Heartstone are beneficial