how big is a yugioh deck Yu-Gi-Oh! Yugi Starter (2002) Complete Set Deck size | Yu-Gi-Oh! Wiki

Although she is only a cost one character, she can sing songs that would otherwise cost three, thanks to her singer keyword ability

Land Color tag templates(None) Great Furnace Artifact Land Color tag templates(None) Inventors' Fair At the beginning of your upkeep, if you control three or more artifacts, you gain 1 life

6 loyalty Player 4 - During his or her upkeep, Player 1 uses Teferi, Master of Time to use its first ability to +1 and Loot

How about we modify the previous combo, but add infinite turns on top of it

When this card is flipped face-up: You can add from your Deck to your hand, 1 "Ghostrick" monster whose Level is less than or equal to the number of "Ghostrick" monsters you control

Warrior of Zera is another good one because he can become Archlord Zerato or possibly mutate into Zera the Mant (his original sword is shaped like Zera the Mants head, almost like foreshadowing)