Celebi allows you to search your deck for any two Pokemon and add them to your hand with a move that costs only one Grass energy
This card was created to be unplayable, and most people who look at it think that the design was a rousing success
Im pretty sure there is no English equilivant for that Charizard which is unfortunate
If you cast a spell for another cost "rather than pay its mana cost," you can't choose to cast it for any alternative costs
Fulminator Mage can sacrifice itself to destroy a nonbasic land, and yes indeed, it will target Tron lands with glee
These all give you access to powerful removal, counterspell, and protection, something very much appreciated in a deck like Calvary Charge that wants a lot of creatures on the battlefield on your side and little on your opponents'