This one I really like too, since it encourages interactivity with the card and artwork without restricting players movement (It restricts what cards your opponent plays, but a lot of normal cards can do that)
I came up with Cecil from FINAL FANTASY IV right away
Players are pairing Hare Apparent with the MTG commander Baylen the Haymaker, and it's not just for the rabbit flavor
However, Liliana, the Last Hope pairs perfectly with Grim Flayer in this situation by shrinking the Sylvan Advocate
Enchantment Elephant Grass Cumulative upkeep (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) Black creatures can't attack you
Magic: The Gathering Comprehensive Rules , 702.2