Yu-Gi-Oh: 10 Most Powerful Unbanned Cards In The Game
1. Linkcross
Linkcross is the most recent card on the list, debuting in 2020s Eternity Code. Linkcross is a level 1 link monster but you need to Tribute a level 2 or higher link monster in order to summon it.
Upon summon Linkcross special summons 'link tokens' equal to the link rating of the monster used to originally summon Linkcross, the typical number being 2, to your side of the field. While the tokens cant be used to link summon they can be used to synchro summon other monsters, most notably Martial Metal Marcher being the main culprit.
In the short time it's been legal this interaction has allowed players to access extra deck monsters their deck normally wouldn't have access to and has caused a number of first turn kills or combos that involve stripping your opponents of all their cards in their hand.
Linkcross should just be straight out banned as it only gets stronger with the printing of new synchro monsters with similar effects as Metal Marcher or link monsters with a link rating of two or higher that are easily summoned.
In the OCG Linkcross was instantly limited to one and was recently banned on their latest Forbidden and Limited list. This is a strong sign that the same will follow in the TCG.