With an Ashnod's Altar, you can easily go infinite: pull a Hyrax Tower Scout or Sparring Mummy from the graveyard, use its enter trigger to untap Mike, sacrifice the Hyrax to make two colourless mana, use it to pay for Mike's ability, rinse and repeat

The reconstructed commons sheet for the 1st Edition/Unlimited variant is as follows (the dagger marks indicate that it is not known where the sheet begins or ends): Kabuto, Caterpie, Poliwag, Unown O, Teddiursa, Wooper, Omanyte, Hoppip, Sentret, Unown E, Larvitar, Pineco, Unown I, Dunsparce, Mareep, Spinarak, Energy Ark, Natu, Weedle, Tyrogue, Poliwag, Caterpie, Kabuto, Wooper, Teddiursa, Unown O, Sentret, Hoppip, Omanyte, Larvitar, Unown E, Energy Ark, Unown I, Pineco, Dunsparce, Weedle, Mareep, Tyrogue, Spinarak, Poliwag, Kabuto, Caterpie, Natu, Omanyte, Teddiursa, Wooper, Unown O, Larvitar, Sentret, Unown E, Hoppip, Unown I, Energy Ark, Pineco, Dunsparce, Mareep, Weedle, Tyrogue, Spinarak, Kabuto, Poliwag, Caterpie, Natu, Teddiursa, Omanyte, Wooper, Unown O, Sentret, Larvitar, Unown E, Hoppip, Dunsparce, Energy Ark, Unown I, Spinarak, Pineco, Mareep, Tyrogue, Kabuto, Weedle, Caterpie, Natu, Poliwag, Unown O, Omanyte, Teddiursa, Hoppip, Wooper, Sentret, Larvitar, Unown E, Energy Ark, Pineco, Unown I, Dunsparce, Weedle, Tyrogue, Mareep, Spinarak, Poliwag, Caterpie, Kabuto, Natu, Omanyte, Wooper, Teddiursa, Unown O, Larvitar, Unown E, Sentret, Hoppip, Caterpie, Dunsparce, Unown I, Pineco, Energy Ark, Spinarak, Mareep, Tyrogue, Weedle, Natu The raw data for the holos is as follows (the dashed line is where the transition from H7 to H6 would occur, assuming all boxes in the sample used the same holos sheet

Cards that ramp are varied and numerous, including: Cards that put extra lands into play, like Rampant Growth Cards that tap for mana, like Sol Ring or Birds of Paradise Cards that reduce costs, like Goblin Electromancer Cards that produce short-term bursts of mana, like Dark Ritual or Dockside Extortionist Ramp is an essential element of Commander deckbuilding
On the other side of the coin though, it isn't a quick-play card and so it's more difficult to get Night Beam actively involved in the game