500 years in the future one piece rare cards TCG: 10 Most Valuable if you have 2 or less Life cards BIG Update! The Top 10

It's not possible to put a creature with power 4 or greater onto the battlefield or increase a creature's power to 4 or greater during the end step in time to have the ability trigger

However, by tributing all three, a new monster can come forward, the all-powerful Valkyrion the Magna Warrior

SE Secret Rare Yaranzo X DARK Level 4 [ ZombieNormal ] ATK 1300 DEF 1500 A treasure box containing a monster that attacks any unwary bandit

Perhaps you are asking the question how may they help the Ultra Athletes

Twin Triangle Dragon X DARK Link 2 [ Dragon / LinkEffect ] ATK 1200 DEF - 2 Level 4 or lower Dragon monsters, except Tokens When this card is Link Summoned: You can pay 500 LP, then target 1 Level 5 or higher monster in your GY

When timed right, it can be game-ending, as the opponent loses an important Monster and their Main Phase to boot