merfolk cards mtg of the Pearl Trident [Classic Sixth Edition] Moderately Played Other Merfolk creatures you control get +1/+1. Magic: the Gathering - Merfolk

Day of Judgement There was a time when Wizards declared four-mana wraths were too good, likely off the back of Sphinxs Revelation dominating Standard with Supreme Verdict for the time it was legal, and control players had to deal with more conditional board sweepers

Flanking seems odd, but it often means Sidar Kondo of Jamuraa kills any blocker before damage

To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of Urianger Augurelt's last ability)

Selfless Glyphweaver / Deadly Vanity Whether you cast the front half or play it as a board wipe, Selfless Glyphweaver brings a lot of flexibility

Cheap conditional removal is played for tempo reasons a lot of the time, otherwise you just play things like Ruinous Path and reliably kill what you need to

You can potentially do this via Time Stop and similar effects, or just exile everything with a blanket effect by casting Summary Dismissal or Mindbreak Trap