Imperial Hullbreachers

Flying is an evasion ability.

A creature with flying can’t be blocked except by creatures with flying and/or reach. A creature with flying can block a creature with or without flying. (See rule 509, “Declare Blockers Step,” and rule 702.17, “Reach.”)

Multiple instances of flying on the same creature are redundant.

Battle cry is a triggered ability. “Battle cry” means “Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.”

If a creature has multiple instances of battle cry, each triggers separately.

Squad is a keyword that represents two linked abilities. The first is a static ability that functions while the creature spell with squad is on the stack. The second is a triggered ability that functions when the creature with squad enters the battlefield. “Squad [cost]” means “As an additional cost to cast this spell, you may pay [cost] any number of times” and “When this creature enters, if its squad cost was paid, create a token that’s a copy of it for each time its squad cost was paid.” Paying a spell’s squad cost follows the rules for paying additional costs in rules 601.2b and 601.2f–h.

If a spell has multiple instances of squad, each is paid separately. If a permanent has multiple instances of squad, each triggers based on the payments made for that squad ability as it was cast, not based on payments for any other instance of squad.