If you have ever browsed a pokemon mega evolution card list and noticed how many entries belong to Mewtwo, that catalog speaks directly to how central Mewtwo is to the Mega Evolution concept
Cleffa O - Grasping Draw Draw cards until you have 7 cards in your hand
Delney, Streetwise Lookout provides lots of extra triggers, while Arabella, Abandoned Doll burns your opponents out of the game
They often synergize with strategies that focus on control, card draw, and tempo, as many Birds have abilities that support these themes, such as tapping down opponents' creatures, drawing extra cards, or providing battlefield-wide buffs
When it comes to protecting a single creature, I like three or four protection spells
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