mtg cards like keen sense | Planar Chaos - Japanese Enchant creature Whenever enchanted creature deals damage to an opponent The 36 Best Card Selection

Shes already a pretty great mana dork in the command zone for a +1/+1 strategy

Thats not because Im lucky enough to have multiple copies most of the time, its because I cast it two or more times in the same game more often than I fail to

Nykthos, Shrine to Nyx can generate absurd amounts of mana, especially if your deck is base green which most hydras are

Cabal CoffersCabal Coffers isn't exactly a new card itself, and neither are several of the black mana-doublers, so getting to the point where you could afford to repeatedly pay Kokusho's commander tax and immediately sacrifice it to a Phyrexian PlaguelordPhyrexian Plaguelord wasn't difficult

Despite this, you support your LGS so they can continue to stay in business