What is important here is not the absolute value, that can be influenced by several factors (humidity, characteristics of the scale, etc) but the fact that 2 cards of the same set should have the same weight
The gamestate doesnt actually keep track of individual counters , so abilities like Zack Fairs arent moving counters from one creature to another: those abilities create new counters on the target
For an extra 3 mana you can choose whether you find Emrakul, the Aeons Torn or Eldrazi Mimic
In the context of the fast mana and efficient card draw available in Vintage, Narset, Parter of Veils is contributing to one-sided games at a higher degree than is healthy
When youve got four or more card types in your graveyard, every delirium ability will be active
This mechanic allows you to cast some spells for a lower mana cost, and it changes their power and toughness