Forum:Unaffected by Spells, Rituals, and Fusion

If a monster on the field is unaffected by Spells, can I use it to Ritual or Fusion Summon?

I only ask because when I was playing Duel Links, I had The Legendary Fisherman and Umi on the field, Fortress Whale, Fortress Whale's Oath, and a Level 4 monster in my hand and couldn't perform the Ritual.

Then I got to thinking: Ritual Spells tribute as the effect of a Spell Card, and cards like Polymerization send materials as Spell effects. So is my thinking correct, or should I have been able to Ritual Summon? Sabre Knight (talk • contribs) 06:35, April 8, 2017 (UTC)