1 Academy Ruins (DRC) 58
4 Arcum's Astrolabe (PLIST) 220
1 Ensnaring Bridge (MB2) 219
2 Fiery Islet (WHO) 278
4 Goblin Engineer (TSR) 345
2 Ichor Wellspring (MBS) 110
1 Inventors' Fair (KLD) 247
4 Mishra's Bauble (MB2) 97
4 Mox Opal (SOM) 179
1 Mystic Forge (PIP) 236
1 Nihil Spellbomb (SOM) 187
2 Pithing Needle (MID) 257
4 Polluted Delta (KTK) 239
2 Pyrite Spellbomb (MRD) 232
1 Sai, Master Thopterist (M19) 69
5 Snow-Covered Island (KHM) 278
3 Snow-Covered Mountain (KHM) 283
1 Snow-Covered Swamp (KHM) 281
1 Spine of Ish Sah (MBS) 136
1 Steam Vents (ECL) 267
2 Sword of the Meek (FUT) 165
1 Tezzeret, Agent of Bolas (MBS) 97
2 Thopter Foundry (ARB) 133
3 Urza, Lord High Artificer (CMM) 130
2 Watery Grave (EOE) 261
2 Welding Jar (MRD) 274
3 Whir of Invention (AER) 49

1 Bolas's Citadel (MB2) 39
2 Ceremonious Rejection (KLD) 40
2 Damping Sphere (DMR) 219
2 Dead of Winter (MH1) 85
1 Engineered Explosives (MB2) 218
1 Galvanic Blast (SOM) 91
1 Ghirapur Aether Grid (ORI) 148
1 Grafdigger's Cage (DKA) 149
1 Nihil Spellbomb (SOM) 187
1 Sorcerous Spyglass (FDN) 679
1 Tezzeret, Agent of Bolas (MBS) 97
1 Witchbane Orb (ISD) 236