Rootha, Mercurial Artist | Lore Drakkis | Brass's Bounty

Cards

Cast
Brass's Bounty by paying ({6} magic symbol) ({R} magic symbol) .
Holding priority, activate
Rootha by paying ({2} magic symbol) and returning it from the battlefield to your hand, copying
Brass's Bounty.
Resolve both copies of
Brass's Bounty, creating at least fourteen Treasure tokens.
Activate the Treasure tokens by tapping and sacrificing them, adding ({9} magic symbol) ({U} magic symbol) ({UR} magic symbol) ({UR} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Cast
Rootha by paying ({1} magic symbol) ({U} magic symbol) ({R} magic symbol) .
Cast
Lore Drakkis for its mutate cost by paying ({UR} magic symbol) ({UR} magic symbol) , mutating it on top of
Rootha.
When
Lore Drakkis enters the battlefield, it triggers, returning
Brass's Bounty from your graveyard to your hand.
Repeat.

If this combo nets infinite mana, you can return other instants and/or sorceries instead.