(A regular Art card can be found in 30% of packs and a foil-stamped Signature Art card can be found in 5% of packs.) In every pack you will find a combination of 15 cards of rarity Rare or higher and 36 Uncommon, 59 Common, and 01 Land cards
But if you have a way to perpetually add more counters to it, or even better, prevent any counters from being put on in the first place, Crack in Time will never have to be sacrificed
Starting off with stats, we've got a two mana, 1/1 commander - nice and cheap, enabling multiple casts from the command zone
(Then again, if you run out of cards, you lose the game, so it'd be pretty funny if that happened as a result but we digress.) You can use cards like Professor Juniper even when you've only got a single card in your hand, effectively increasing your chances sevenfold of having a better hand to suit your situation
Encore Whats better than casting a powerful creature in Commander
Check my 15 go-to red cards