Instead of doing the conversation first and the proof second, let's just do the proving
However, its in Arthurs ability that he truly shines: when played, he can give a chosen character Challenger +2 and Resist +2 (that means they get +2 Strength while Challenging and a reduction of 2 damage thats being dealt to them), plus they can also challenge Ready, not Exerted, characters on the same turn too
The second effect is even stronger in the right deck, such as a Phyrexian-themed Commander deck
There are plenty more ways to play Magic: The Gathering that we will likely cover right here on TechRaptor but most players are better of starting with a standard deck and moving their way to commander to get a feel for the different mechanics before making their way further
Budget Lifegain keeps getting better and better
Its Electrocharge also supports the Thunderbolt attack by providing the Electing Energy needed