The answer is no. "When X attacks" triggers trigger only at one time: When the X creature is declared as a attacker as a turn based action during the attack step. If the equipment with the attack trigger isn't on the creature at the start of that step, the ability won't trigger.
In Magic there's a distinction between "attack(s)" (verb), and "attacking" (adj.). A creature "attacks" when you declare it as an attacker, and a creature is "attacking" when it is in combat and you are the attacking player. Similarly, creatures put into play "tapped and attacking" never actually attack.
This is a very common source of confusion among new players.
There is, however, nothing stopping you from flashing in equipments in the beginning of combat step, if you wish.
Magic the Gathering, FNM is TM and copyright Wizards of the Coast, Inc, a subsidiary of Hasbro, Inc. All rights reserved. This site is unaffiliated. Articles and comments are user-submitted and do not represent official endorsements of this site.
sonnet666 says... Accepted answer #1
Please link all of the cards in you question: Sigarda's Aid, Sword of the Animist, Argentum Armor, Moonsilver Spear.
The answer is no. "When X attacks" triggers trigger only at one time: When the X creature is declared as a attacker as a turn based action during the attack step. If the equipment with the attack trigger isn't on the creature at the start of that step, the ability won't trigger.
In Magic there's a distinction between "attack(s)" (verb), and "attacking" (adj.). A creature "attacks" when you declare it as an attacker, and a creature is "attacking" when it is in combat and you are the attacking player. Similarly, creatures put into play "tapped and attacking" never actually attack.
This is a very common source of confusion among new players.
There is, however, nothing stopping you from flashing in equipments in the beginning of combat step, if you wish.
February 2, 2018 3:31 p.m.