Many of the cards in the deck deal with adding these counters, plus plenty of +1/+1 counters to your creatures, so you can bet that there are tons of ways to proliferate all your counters up to even higher levels and to keep your opponents constantly losing life through either combat or radiation
Once a creature with decayed attacks, it will be sacrificed at end of combat, even if it no longer has decayed at that time
Rather, a second "reflexive" ability triggers when you search your library this way
Notable Cards: Reprints and $$ First caveat: I cant really evaluate new-to-Magic cards for monetary value , since pre-sale prices are always ridiculously high
In the PlayEDH power level system, the strength and acceptable density of these types of cards scales with power levels
Let's look at them in alpha order