Mobius the Mega Monarch [LVAL-EN040] Ghost Rare Flames of Destruction This ability costs an additional

This ability costs an additional [1 Resource] to activate for each Runechant you control

rocks scorched

or exclusive rare (see below)

Here's a breakdown of what you'll find in a Commander Legends Collector Booster:

Mobius the Mega Monarch [LVAL-EN040] Ghost Rare Flames of Destruction This ability costs an additionalSet: Legacy of the Valiant Card type: Effect Monster Rarity: Ghost Rare Attack: 2800 Defense: 1000 You can Tribute Summon this card by Tributing 1 Tribute Summoned monster. When this card is Tribute Summoned: You can target up to 3 Spell Trap Cards on the field; destroy those targets. If this card was Tribute Summoned by Tributing a WATER monster, add this additional effect. Your opponent cannot activate the targeted card(s) in response to this