how to tell if the pokemon card is rare Rarities Explained What are Special Art Rares?

Tera Orb is an Item-level search for a Tera creature, so if any strategy emerges for one, its a logical deck inclusion

But the Water type is much better than the Metal type

Cutter Shark X WATER Level 5 [ Fish / Effect ] ATK 0 DEF 2000 When a card or effect is activated that targets 1 monster you control (and no other cards) or when a monster you control is targeted for an attack, while this card is in your hand or GY (Quick Effect): You can Tribute that monster

An example of this is Exyz Agent

This is something you put into play rather than Unearthing or Sneaking in as the haste is wasted in the latter cases and that is a big part of what makes this viable