However, their effects proc so long as they die when they were a creature , meaning if Zur turns them into a creature after they used their effects, if they die again they'll go back to being an enchantment
While Ragavan, Nimble Pilferer has been looking more problematic and especially unfun in Vintage and Legacy (banned), its still relatively balanced in Modern
In effect this means you are losing a bit of card advantage to gain the tempo which is generally a fine thing to do
100+ Deck Box stores up to 100 double-sleeved cards
Sturm and Artz have an incredible record of success 99% of their clients stay out of jail and keep their license on first or second DUI offenses, and they win Not Guilty verdicts all charges dismissed in 90% of their DUI jury trials, even in cases involving prior convictions, accidents, high blood alcohol levels, and BAC test refusals
In other words, Proliferate lets you put more good counters on your cards which already have good counters on them, and put more bad counters on your opponents stuff with bad counters