The attack and sacrifice triggers often are fine at their lowest power level with say a 1/1 token, but the power gets jacked way up when you have cards with more power than their mana value like Anticausal Vestige
See the S12 Paradigm Trigger card list
Heres a list of the Enchanting Tales cards MTG has previewed so far: Greater Auramancy Smothering Tithe Curiosity Rhystic Study Necropotence Aggravated Assault Doubling Season Prismatic Omen Some Enchanting Tales cards will be replaced with their Booster Fun alternate version - anime borderless artwork
Whenever you gain life, put a +1/+1 counter on this creature
However, MTG rules say that you win the game effects override you cant lose the game effects
Breaking Down The 30 Cards You Need To Unlock The Shiny Mew Emblem Shiny cards are pretty rare, and notoriously difficult to find, especially since they only appear as the sixth card in special packs (Pocket's booster packs typically have five cards each, unless there's a special shiny sixth card waiting at the end)