@Capt_Gigglepants
I only played a little bit with red on the side, so never got to try out Hidetsugu myself.
But he looks pretty strong even by himself considering he can cut somebody´s HP a few times and then you just burn your opponent with a damage spell. (and what red deck don't have that)
Black ( and Blue ) was more of my brother´s colours tho.
However I did play a little of Ravnica, but that is where I more or less stopped.
I got a starter deck as a present but never really got to play it much:
I am and have always been a green fanboy so it was token spamming for me. ( Edit: after looking it up, it was the "Selesnya United" starter deck )
I did really like the tree land that made tokens, it was pretty busted and won me most of the few games I played with it.
That said I loved the lore concept of a "city world" that is divided into guilds like Ravina ( or Isunia from Shadowverse if you played that card game... its free on steam if you got some time to waste )
Btw fun fact, Ravnica was actually made a Cannon setting in Dungeons and Dragons a few years back it was a pretty weird Deja vu moment before I realised where it came from.
( i play some DnD now and then with a few friends and one of the mad lads actually got the book for the setting for a campaign )