Infinite Loop FTW. Introducing two more Spellcaster Monsters

[Not-so-Radiant Arin]

|Lifetrancer Erin|0|WOSV|Spellcaster/Effect|Light|3||1200|200|If the effect of a "Lifetrancer" monster was activated during this turn, except "Lifetrancer Erin", you can send 1 "Lifetrancer" monster from your Deck to the Graveyard. If this card is in your Graveyard, you can send 1 "Lifetrancer" monster from your Deck to the Graveyard to Special Summon this monster.|

|Lifetrancer Melanie|0|WOSV|Spellcaster/Effect|Light|4||1500|200|If the effect of a "Lifetrancer" monster was activated during this turn, except "Lifetrancer Melanie", you can send 1 "Lifetrancer" monster from your Deck to the Graveyard. If this card is in your Graveyard, you can send 1 "Lifetrancer" monster from your Deck to the Graveyard to Special Summon this monster.|

[Time Psyduck]

It's not really infinite. You send one of these to the grave, then mill 5 to summon 5 (that or summon one when you have Psychic Lifetrancer out). Then you have a bunch of monsters on the field. Sure, you can Synchro/Xyz with them, but you've no way to return them and close the loop.

Still, they're way too powerful. They're +1 special summons that set up another one in coming out, and can be used again when they die/get used up on the field. There needs to be a "The effect of Lifetrancer X can only be activated once per turn/duel" clause, possibly even banishing any SS from the grave as well, to limit how much they can be abused.

[Not-so-Radiant Arin]

I wasn't actually thinking about "Psychic Lifetrancer" until you posted. But in order for it to work, the target monster has to be Psychic. These cards be Spellcaster.

And about the once per turn thing, it would be good to limit, but you don't really see a Spellcaster Archetype that can swarm the field that fast.

[Time Psyduck]

You wouldn't hit one of these with Psychic Lifetrancer - you'd remove some other Psychic you were using to trigger the loop.

The problem is swarming the field that fast just means you can bring out 4 big Synchro/Xyz monsters, which can pretty much be game. Given that it's very difficult to stop these summons (since a lot of anti-monster summoning sends them back to the grave, where they'd just go again for re-summoning) they're way too easy to bring out. Maybe add another if you feel it's really necessary, and then make each one usable only once a turn. That way you can still get several monsters out in a turn (and with the right other cards possibly still OTK), but it's not running through 10-15% of your deck at once to summon a bunch of monsters.