If you own a card but do not control it, it is not "yours" for the purposes of abilities
Make a billion tokens, make a billion mana, draw a billion cards, pump all your creatures, and swing for lethal in a single turn, is what Tomer said that usually happens with this commander if its let free
Skullclamp's "downside" of -1 toughness was a boon since the player can cheaply equip it to an X/1 creature and have it die to draw two cards, all without needing blue mana
NeoCosmosAKA10001407 140 KB This leads me to suspect that the use of the Retro-Cosmos Holofoil might have been intended as a subtle celebration of Kadabras return to the TCG but does not explain my Retro-Cosmos Holo Abra or the use of both Holofoils for 151s Holo Basic Energy
Not quite as universally effective, but its still a 3-power white creature with flying and flash that can save a creature by blinking it
Beat an opponent then