mtg play test cards Zyym, Mesmeric Lord [Mystery Booster Playtest Cards] (This happens each time a spell you control or an ability of a permanent you control causes an opponent to pay extra mana Are MTG Playtest Cards Real?

A fully stacked Ring-bearer can be hard for your opponents to deal with, so this could be an interesting build

Cards like Mental Modulation will help to keep the spell count flowing

As it does the same for the opponent, it can also be used to ruin their current strategy

Holiday bundles, Scene boxes, and Special Edition collector boosters A second printing of LTR dropped in November, containing four new Scene holiday bundles, along with special edition collector booster packs

If they are holding removal or countermagic you can take that away, see what other options they have and then do your own thing with perfect information and safety