Myr Reservoir 
Artifact
: Add 
. Spend this mana only to cast Myr spells or activate abilities of Myr.
, : Return target Myr card from your graveyard to your hand.
Legality
standardNOT LEGALpioneerNOT LEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL