Denry Klin enters with your choice of a +1/+1, first strike, or vigilance counter on it.
Whenever a nontoken creature you control enters, if Denry Klin has counters on it, put the same number of each kind of counter on that creature.
Load Denry Klin up with as many counter types as possible, then drip nontoken creatures onto the battlefield so each one is born with a copy of every counter Denry carries. You snowball into a board of oversized, keyword-stacked creatures and beat down, ideally accelerating Denry's counter count with proliferate and counter-doublers before going wide with value creatures.
Copies ANY counter type, not just the three listed, so flying/double strike/keyword counters all propagate to your whole team
Turns ordinary creature drops into immediate threats with built-in evasion and stats
Scales hard with proliferate and counter-doubling effects
Lives in UW, the best colors for protection, card draw, and resilience
Heavily commander-dependent—removing Denry shuts off the engine and resets your tempo
Counters do nothing for tokens, so go-wide token strategies don't synergize
Slow to set up; needs a turn or two to stack counters before payoff
Targeted/board wipes hurt since your value is invested in creatures
Legendary Creature — Cat Advisor
