In the decks that use this card best, it essentially serves as additional higher mana cost copies of your best combo cards
No, not that I can tell, I have scanned in thousands of cards with my pre production units, and I can't find any damage Does it damage the corners of cards

A Killer Among Us Abundant Countryside Adaptive Automaton Ageless Sentinels Alpha Status Amoeboid Changeling Amorphous Axe An Unexpected Party An-Zerrin Ruins And They Shall Know No Fear Aphetto Dredging Arachne, Psionic Weaver Arachnoform Arcane Adaptation Archon of Valor's Reach Artificial Evolution Ashes of the Fallen Atraxa, Grand Unifier Avian Changeling Azula, Cunning Usurper Banner of Kinship Baral and Kari Zev Barbarian Guides Barbflare Gremlin Barkform Harvester Basalt Ravager Belbe's Portal Belonging Bilbo, Luckwearer Birthing Boughs Black Market Connections Blades of Velis Vel Blood Oath Bloodline Bidding Bloodline Pretender Bloodline Shaman Boldwyr Intimidator Boseiju, Who Endures Braids, Arisen Nightmare Brass Herald Bucket List (playtest) Cactus Preserve Cairn Wanderer Call to the Kindred Caller of the Hunt Callous Oppressor Cavern of Souls Celestial Reunion Cemetery Gatekeeper Cemetery Illuminator Cemetery Protector Cemetery Prowler Chameleon Colossus Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chaotic Transformation Chitinous Graspling Chomping Changeling Chronicle of Victory Circle of Solace Cloud Key Coalition Flag Coalition Victory Coat of Arms Collective Inferno Confusion in the Ranks Conjurer's Mantle

You might wake up dangling over a pot of oil wishing you hadn't messed with the cachemaster
I then began spending my allowance money buying games and trying to reverse-engineer them to figure out what made them fun