Like Sauron, the Dark Lord, this card is best in the Commander format, where paying 5UBR is tough but managable and there are enemy commanders to trigger Sauron's second ability
Hisuian Zoroark VSTAR, for instance, surrounded by Bidoofs
Basically, Starscream wants you to trade the monarch token around as much as possible, so long as you plan to draw cards while youre the monarch
Vengevine A Vintage staple, Vengevine is a recursive beater with haste that springs back from the graveyard whenever you cast your second creature spell in a turn
Check it out if you like card draw
But why would you want to get life gain for your deck after having discussed how it is a dead resource unless you can abuse it