You need your opponent to have cast at least three spells for it to be worth the 4 mana you invest into it, which happens in a single turn cycle in Commander but takes far too long in Limited
In competitive play, Magic Lifelink is often used to gain an advantage over opponents and stay alive in long games
Mewtwo awakens, destroys the laboratory that created it, escapes to New Island, and builds an army of cloned Pokmon to challenge humanity
This lets you chip away at the active Pokmon while preparing to knock out a benched one
Did you include every type of card variant (regular, poke, master, AR, SAR, BWR, promos) or only certain ones
Foundations Jumpstart (J25) and Special Guests (SPG) are Commander-, Legacy-, and Vintage-legal sets, and individual cards are also legal where already available in other formats