you can also use isocron scepter with dramatic reversal and enough mana rock for example

-use isocron septer with dramatic reversal imprinted -announce you are going to use isocron scepter for 2 -then tap enough mana rocs to generate 3 or more mana (also you cheat the monoliths) or use gilded lotus for colored mana

sorry not the best speller

also use grand arbiter so u dont need mana rocks

use some transmute tutors too they are like three mana each and will make sure you can get your combo pices before you get muldrotha out

here is gatherer link http://gatherer.wizards.com/Pages/Search/Default.aspx?action=advanced&text=+[transmute]&color=+[U]