This is entermage trapeze magician
Rank 4 Light spellcaster type ATK 2500 DEF 2000
2 Level 4 spellcaster type monsters
You take no damage lower than or equal to this card's ATK. Once per turn, during either player's Main Phase 1: You can detach 1 Xyz Material from this card, then target 1 other face-up Attack Position monster on the field; it can make a second attack during each Battle Phase this turn, but destroy it at the end of the Battle Phase. If this card is destroyed by battle and sent to the Graveyard, or if this card in your possession is destroyed by an opponent's card effect and sent to your Graveyard: You can Special Summon 1 "Entermage" monster from your Deck.
I think this card is good in a charmer deck because you don't want to take big amount of damage to your LP. This card is also good for the Rank 4 familiar-possesed deck because you can used this card effect to target a archfiend eater or jigabyte to have them attack twice then at the end of the battle phase Jigabyte will get destroyed and will trigger it's effect. So I think this card is good for charmers. I know I could summon downard magician and and become a 2500 ATK but I like to have those options.