mtg for each card in your graveyard How Every Commander Deck Can Use the o:"for each creature card in

However, it could just be the bonus card included in each of them

a few potential targets to drop into play include the on-color titans, Combustible Gearhulk, and creatures that benefit from combat like Professional Face-Breaker

But for others, we need to drill down and examine if there are enough concepts for what we need

Lightning Bolt, Chain Lightning, Lightning Helix, Flame Slash, Galvanic Discharge, and Unholy Heat keep creatures off the table and help close games

The New Voyages End Once again, a 1U instant is the best blue common in Theros

Some typal decks overlap with the spellcasting theme, namely Wizards and Merfolk, though you'll need to consciously run spells that can target your own permanents