mtg guild cards Guilds of Ravnica Izzet Kit [60 card deck Age Group All 10 Guilds of Magic:

Meanwhile, Combustion Technique just gives us a two-mana hard removal spell that even exiles the creature it kills since our deck is so good at filling the graveyard with lessons

Oops All Typal As expected, the Everyones Invited Secret Lair Commander deck is largely built around Shapeshifters with Changeling

There are multiple directions you can take it as you make it your own

1 Chaos Warp

I don't believe either of those rules are in contention for the top spot of "old rules that would still be be sweet to use in oldschoolmtg", but that is a fully different post

Whenever Bruse Tarl, Roving Rancher enters the battlefield or attacks, exile the top card of your library