It's ETB to pump your stuff by +2/+2 and then given them its abilities and then damage cannot be prevented this turn too, great little win-con Overrun there
Since the main goal of collectible card games is actually using and playing with them, there's no need for air-tight security, as one would do with a rare baseball card
Cipher (Then you may exile this spell card encoded on a creature you control Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)
This is nasty good in tons of places from Tokens to Aggro to Burn to Spellslinger
For more on Magic: The Gathering , find out why were so excited about the new prepare mechanic in Secrets of Strixhaven
Most often, this bonus comes in the form of an ability your commander gains or a boost to their power and/or toughness