Cast Against All Odds by paying ({3} magic symbol) ({W} magic symbol) , choosing the first mode targeting any artifact or creature you control, and optionally the second mode.
Dualcaster Mage enters the battlefield, copying Against All Odds, targeting Dualcaster Mage.
Resolve the copy of Against All Odds, blinking Dualcaster Mage and returning an artifact or creature with mana value three or less from your graveyard to the battlefield if the second mode was chosen.
Repeat from step 3.
Results
Infinite ETB.
Infinite LTB.
Infinite magecraft triggers.
Return all artifacts and creatures with a mana value of three or less from your graveyard to the battlefield.