Gibbering Kami

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.

Soulshift is a triggered ability. “Soulshift N” means “When this permanent is put into a graveyard from the battlefield, you may return target Spirit card with mana value N or less from your graveyard to your hand.”

If a permanent has multiple instances of soulshift, each triggers separately.