pokemon dark dragonite card (22/82) As often as you like during your turn (before your attack) Its easy to see why
Description
Command your army with Ureni, spirit dragon of wisdom, or Eshki, leader of the Temur clan
Put the chosen cards into your hand and shuffle the rest into your library

Luckily, you'll often only be casting spells on your turn to begin with (minus interaction like counterspells)

Both are good, but Essence Flux has the benefit of making things slightly stronger

That's likely due to Tolkien's high-fantasy world being so similar that one could imagine Middle-earth as just another of Magic's many planes

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