If that creature isn't a Sliver, it becomes a Sliver in addition to its other types
The idea here is to attack and give a defender suspected so it cannot block and get your swing in and if you had haste you could do that twice and stop two blockers
As always, Id suggest upgrading the mana base first, but if you want to spend a few extra bucks you could always add Roaming Throne, to double up on your commanders ability, Helm of the Host, to get more copies of Jon, Phyrexian Obliterator, because that seems like a fun creature to give away, and Sakashima of a Thousand Faces and Sakashima the Impostor, to clone your commander.
You can make your opponents sacrifice their best permanents while you throw away tokens and excess lands
Includes one of each blister pack (Sneasel & Weavile)
Suddenly, players had eight copies of Fabled Passage and the temples, and Arena doesnt let you dust cards or trade