For one Mana, Ruin Crab is a Blue 0/3, hooray
The Threats Narset, Parter of Veils is card advantage and a lock piece against every deck that wants to draw cards (which is most of them)
Jump to: Fortunately, just like with video game storage, there are all sorts of carefully crafted containers you can use to protect your trading cards these days
My list of cards I think are vital here include Azusa's Many Journeys // Likeness of the Seeker, Burgeoning, Druid Class, Dryad of the Ilysian Grove, Exploration, Jugan Defends the Temple // Remnant of the Rising Star, Sanctum Weaver, Song of Freyalise, The Mending of Dominaria, and Utopia Sprawl
If the ability divides damage or distributes counters among a number of targets, the division and number of targets can't be changed
Be cautious of counterfeit cards, especially for high-value singles