Sleep is also not as reliable of a disable as Paralyze, giving your opponent a 50-50 chance of shrugging it off, so its probably safe to use it as a secondary defensive layer
That remains the most expensive card ever, but this weekends sale suggests the impact of that price is lasting
The Iono SAR from Clay Burst [SV2D], for example, had an initial price of over 200,000 JPY (~US$1,495 at the time)
Exalted is a useful keyword that lets this creature attack when you dont need the mana and has made it powerful in archetypes that care above every point of damage, such as infect
They are also great with toughness matters brews, since they can deal a lot of damage for a low cost
To make things easier, start by sorting your collection by rarity to find the expensive uncommon, rare, and mythic rare cards