Six mana is probably too much for Constructed formats, but milling four cards is a nice little addition to the effect that might help it see play in reanimator decks
Create a token that's a copy of the card with the chosen name
These cards deal incremental bits of damage to your foes that add up over the game
All your damage, whether from combat or not, will resolve, and then a separate trigger will occur for each Sliver, gaining life equal to the damage that was dealt
Imperial Seal The king returns Imperial Seal is a one-mana Black sorcery spell that allows you to find a card from your library and put it on top of it
[24-022H] Gogo Gogos Auto Ability will trigger if a category VI Forward card that possesses a Limit Break is moved from the Field to the Break Zone, but the Forward card will be removed from the game before the abilitys effect is resolved, so it is not possible to add it to your hand