Both Shard Phoenix and Spike Feeder can be sacrificed for zero mana, meaning Bob could actually keep Oathing turn after turn, thanks to the aforementioned Gaeas Blessing recursion keeping things going
Howlsquad Heavy is worded similarly to popular cards like Goblin Rabblemaster and Legion Warboss, which create Goblins at the beginning of combat on your turn
When it comes to card games, rarity is a good indicator of the designers letting us know what to look out for
Dragons At the beginning of your upkeep, each opponent loses 2 life and you gain 2 life
Ifrit, Warden of Inferno Legendary Enchantment Creature Saga Demon [I] Lunge Ifrit fights up to one other target creature
even if two players are venturing through two dungeons with the same name, each of them owns a separate dungeon card