Commander, or Elder Dragon Highlander (EDH) as it was called before Wizards decided to develop for it directly, is probably the most popular casual MTG format available
Discard all Fire Energy cards attached to Blaine's Charizard except 1
Splitting a case with friends can yield up to a 30% savings
If Gobland gains flash, or you have the ability to play Gobland as though it had flash (due to Teferi, Druid of Argoth, for example), you can ignore the normal timing rules for when during your turn you can play a land, but not any other restrictions
Contamination acts similarly to Blood Moon in its ability to shut off the ability of Dual lands to tap for different colors of mana
Any one, tow or three drop that is near the top of what it does remains in the cube and sees plenty of play even when better cards are printed however the top end just stop seeing play all together.