i have a question in say a 4player commander i equip blade of selves to portal mage. i declare a player im attacking im attacking you with portal mage would they declare blocker before blade of selves triggers?. im asking cause i want to know if i can do this stratagy. step 1 declare attack and target declares blocker step 2 blade of selves triggers maken copys for each other opponent. step 3 portal mage trigger happens can i redirect all portal mages to the same target opponent since it is during attacking step reselect target of attacking creature?.
Once the attack is declared the myriad ability will trigger (before blockers are declared) and you will get a Portal Mage for each opponent. You can have each Portal Mage target themselves and change who they are attacking, making them all attack the same player if you wish. After this the declare blockers step will happen and anyone still being attacked will declare blocks.