search spell cards yugioh Yu-Gi-Oh! - Calling (POTD-EN039) - Power of The Duelist - 1st Edition Tribute Summon 1 monster (and you can Tribute monsters your opponent controls even though you do not control them) Hidden Book of Spell -

1 Special Foil Greninja (Gold Star) Promo Card

are split into three categories of severity: Semi-Limited is the most lenient stage of banning, and cards that are either being banned or unbanned often become semi-limited as a test to see whether more or less involvement is needed

The image featured at the top of this post is Pokemon Sapphire key art / Original

Most of these cards win the game if not answered pretty sharpish so a lot of it comes down to how easy the card is to include in a deck, how easy it is to cast and what the range of good answers for it are

1 Timberwatch Elf

It cant be the target of spells or abilities, its static abilities have no effect on the game, its triggered abilities cant trigger, it cant attack or block, and so on