Here are some common examples: Creature types : Goblin, Elf, Dragon, Zombie, etc
If youre running this card as your Golgari commander, that means even if your opponent counters it the first time, you can just sacrifice the squirrels from your cast trigger to try again
The one rule of lifegain: sources feed payoffs A lifegain deck has two halves, and it is dead without both: Sources cards that gain you life, ideally incrementally and repeatedly (lifelink, whenever a creature enters triggers, upkeep gainers)
You can use Norman Osborn to set up your graveyard, and when you transform it into Green Goblin, you may cast these cards from your graveyard at a reduced cost
The card ended up getting named after me, so I bought the art, and it now sits in my den along with my three other pieces of original Magic art (Jester's Sombrero and Look at Me, I'm the DCI from Unglued and Mise from Unhinged )
Unsettled Mariner counters a spell or ability from your opponent unless they pay one generic mana