Mahdrahx: Mechanics

Invincible: This creature cannot be dealt damage by other creatures during combat. Used on 6 cards: Bastion Gate Guards, Dunewalker Spellblade, Bastion, the Last and the First, Tahrna, Raider Empress, Bastion Phalanx, Khyvrix Nil, Lord Guardian

Tunneling: This creature can't be blocked by creatures with flying. Used on 7 cards: Trap Door Predator, Viashino Dunereaver, Raider Battlemount, Sand Hopper, Scavenger's Bane, Old Stone Mother, Matriarch of the Sands

Repair: You may cast this card from your graveyard by sacrificing an artifact and paying {PARAM1}. If you do, it enters the battlefield with a salvage counter on it, and it’s exiled whenever it would leave the battlefield. Used on 5 cards: Storm Glider, Raider Battlecart, Raider Junk-a-pult, Wall of Blades, Jahrzz Rolgh, Salvager

This mechanic represents post-apocalytic salvage that has been returned to functional condition. Repairs aren't perfect, though, and most devices are rendered entirely useless if they're broken again, hence the exile.

Command: Used on 0 cards:

Command is an activated ability that interacts with tactical spells, representing clever use of the limited resources on mahdrahx.

In card text or details pages, write the mechanic's code name (playtest name) between square brackets, like "[Crittercast]", "[Bushido 1]" or "[Delay 4 {2}{R}{R}]". It will be expanded to the mechanic's name plus reminder text, such as "Suspend 4 – {2} {r} {r} . (Rather than cast this spell from your hand,...)"
To expand a mechanic's name but not its reminder text, include parentheses at the end of the square brackets: "[Crittercast()]", "[Delay 9 {R}()]".