You too can make a Link 4 with a Link 4.

CHIM-JP052 転生炎獣の超転生[サラマングレイト・トランセンド] Salamangreat Transcend (KCM: Salamangreat Transcendence)
Quick-Play Spell
You can only activate a card with this card’s name once per turn.
(1) Target 1 “Salamangreat” Link Monster you control; Special Summon, from your Extra Deck, 1 “Salamangreat” Link Monster with the same name, by using only that 1 monster you control as material. (This is treated as a Link Summon.)