Even after you attack and use up the Rhinos Energy, youre still only up to a 3/4, which wouldnt be good enough to pay three mana for
9th, 2022 in North America and Europe
Drop it on turn 1 and you get a significant advantage over your opponents when you can use its effect
C Common Zombino X EARTH Level 4 [ ZombieNormal ] ATK 2000 DEF 0 The two are so close They die and return to life Inseparable C Common Lockout Gardna X EARTH Level 3 [ CyberseEffect ] ATK 1000 DEF 1000 When an opponent's monster declares a direct attack: You can Special Summon this card from your hand in Attack Position, and if you do, it cannot be destroyed by battle this turn
It reins in some consistency engines and overdue traps, but leaves several format-defining cards unchecked
I played on that side of Duel Links a fair bit, and lots of duels just took longer to finish since a helpless opponent would just play three monsters, which I then mowed through with mine