Magma Sliver
Casting Cost:
All Slivers have ": Target Sliver creature gets +X/+0 until end of turn, where X is the number of Slivers on the battlefield."
$ 000
Magma Jet
Magma Jet deals 2 damage to target creature or player.
Scry 2 (Look at the top two cards of your library. Put any number of them on the bottom of your library and the rest on top in any order.)
Magistrate's Scepter
, : Put a charge counter on Magistrate's Scepter.
, Remove three charge counters from Magistrate's Scepter: Take an extra turn after this one.
Magical Hack
Change the text of target spell or permanent by replacing all instances of one basic land type with another. (For example, you may change "swampwalk" to "plainswalk." This effect lasts indefinitely.)
Magewright's Stone
, : Untap target creature that has an activated ability with in its cost.
Mageta the Lion
, , Discard two cards: Destroy all creatures except for Mageta the Lion. Those creatures can't be regenerated.
Maga, Traitor to Mortals
Maga, Traitor to Mortals enters the battlefield with X +1/+1 counters on it.
When Maga enters the battlefield, target player loses life equal to the number of +1/+1 counters on it.
Maelstrom Wanderer
Creatures you control have haste.
Cascade, cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order. Then do it again.)
Maelstrom Pulse
Destroy target nonland permanent and all other permanents with the same name as that permanent.
Maelstrom Nexus
The first spell you cast each turn has cascade. (When you cast your first spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)
Maelstrom Archangel
Flying
Whenever Maelstrom Archangel deals combat damage to a player, you may cast a nonland card from your hand without paying its mana cost.