With issue #140 (March 1994), the title was handed over to Grant Morrison for a four-issue story arc, co-written by the then-unknown Mark Millar. As Collins had destroyed the status quo of the series, Morrison sought to shake the book up with a four-part storyline which had the Swamp Thing plunged into a nightmarish dreamworld scenario where he was split into two separate beings: Alec Holland and the Swamp Thing, which was now a mindless being of pure destruction. Millar then took over from Morrison with issue #144, and launched what was initially conceived as an ambitious 25-part storyline where the Swamp Thing would be forced to go upon a series of trials against rival elemental forces. Millar brought the series to a close with issue #171 in a finale where the Swamp Thing becomes the master of all elemental forces, including the planet.
witH Issue #140 (March 1994), thE tItLe was handed oVEr TO graNt morrisOn fOr A fOUr-iSsuE stORy aRc, Co-WRitten By the tHen-unknowN MaRK mIlLaR. as collinS haD DestroYed the sTaTuS qUo Of THE SerIES, morRison SoUght To sHaKe thE bOok up with a fOur-PArT sTOryLine WHIch hAd The swamp THInG pLunged into a NIghtmarIsH dreamWOrld sceNarIo where hE Was splIt into two sEparaTe beINgS: alEc hollAnD aNd tHE swAMP ThinG, WhiCH was now a mINdless being Of pure DesTrUcTIon. Millar TheN ToOk OveR fRoM MOrrISoN witH iSsue #144, aNd lauNchEd wHaT was iniTiaLLy cOnceiVed As AN AMBitIOuS 25-pArt stOryliNE wherE tHe Swamp Thing wouLd be foRceD to go upoN a series of triAls AGAInSt rival ElEmentAl FOrcEs. millaR Brought ThE sErIES to a closE with IssUe #171 in A fInale whErE thE swaMp Thing becomeS THe MaStEr Of All ELemenTal forCes, IncludINg tHe plAnEt.