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Kadenas Silencer lets you counter every single ability your opponents control

You know, for reasons

(Leads to: Forge, Lost Well) Forge Put two +1/+1 counters on target creature

If one of them resolves, it will remain in effect until the game ends, Tenth District Hero leaves the battlefield, or some subsequent effect changes its characteristics, whichever comes first

Floral Evoker A landfall engine that turns growth into resurrection

Orcus, Prince of Undeath Okay I will admit, I am a bit bias with anything related to Rakdos but honestly Orcus, Prince of Undeath really is worth every bit of mana (and potentially, your life) you give to it