If you're interested in the format, I'd look at picking up staples sooner rather than later
These 'control' elements are a common part of card games but are rarely as powerful as these banned cards, and their power level made the expanded format un-fun to play
While Nadu was overshadowed by the three other heavy hitters in the same ban announcement, it was still a very significant move
One of the best white creatures, Sunny's a big body that returns a cheap permanent from the graveyard to the battlefield ( any permanent, not just a creature), and if our foe doesn't want our Sun Titan to keep generating value every turn, they'll have to spend at least a card dealing with it ASAP
To put that into perspective, the vintage grail for most collectors is the Shadowless Charizard, which ungraded sells for around the $750 mark
the M Gengar EX card can be quite expensive with prices reaching $300 in a recent online auction