In order to keep Standing Army from tapping when attacking, you need to be standing (thus granting the Army vigilance) until you're done declaring attackers
Creatures (22) 2 Surrak, the Hunt Caller 3 Hangarback Walker 4 Reality Smasher 4 Sylvan Advocate 4 Thought-Knot Seer 1 Kindly Stranger 4 Moldgraf Scavenger Lands (24) Spells (14) Ill go ahead and recommend against this deck, but will highlight that you should start testing for Constructed by actually playing with the new cards
Packs per Box This product includes a number of factory-sealed packs of cards
When this creature enters, discard any number of cards, then draw that many cards
Legendary Creature - Angel Eldrazi Color tag templates(None) Color tag templates(None) Griffin Creature Token - Griffin Color tag templates(None) Soldier Creature Token - Soldier Color tag templates(None) Soldier Creature Token - Soldier Color tag templates(None) Spirit Creature Token - Spirit Color tag templates(None) The Monarch At the beginning of your end step, draw a card
Arena looks better, but it currently seems even less capable of doing these things, which means that the program might never have Modern or Legacy functionality