I suggest you ease up the summoning restrictions (how about 1 "Agent" syncro + 1 "Agent" effect monster?) and lower the protection it has, either through lower ATK/being able to be targeted/being given a non-continuous protection
Below is a focused look at cards whose effects have proven dominant across competitive eras
Duel rewards[edit] When dueling against Level 40 Bandit Keith, these are the only cards that can drop
Other sleeves[edit] Korean card sleeves[edit] Logo sleeves[edit] Monster sleeves[edit] "Heroic Champion - Excalibur" 50 Pack "Ghostrick" monsters 50 Pack "Erebus the Underworld Monarch" 55 Pack Other sleeves[edit] Chinese card sleeves[edit] Winter Promotion[edit] Volume 1 Limited Edition sleeves[edit] Starting from October 11, 2014, for every 5 Booster SP: Tribe Force packs purchased, the purchaser will also receive 1 "booster pack" containing 5 sleeves of 1 of the above random designs
Weve become accustomed to sets mainly prioritising holographic reprints of in-demand cards over the years (both through the yearly Mega Tins and sets like Hidden Arsenal) but this one was different
The strategy centers on Flip effects plus Graveyard power