Herald of Leshrac's cumulative upkeep is gaining control of a land you don't control (meaning eventually you'll run of out lands to steal)
Mechanically, you can add one of the options to your spell as you cast it, with stronger effects requiring more mana
Battles of Legend: Monster Mayhem has new cards for Nekroz, Gem-Knight, Jurrac, Fabled, D/D, and Magistus Decks, plus a lot more.Also not a surprise, this massive 177-card set has plenty of old and new
Weakness: Fighting (x2) Resistance: none Retreat: 1 Raichu - Lightning - HP130 Stage 1 - Evolves from Pikachu [L] Quick Attack: 20+ damage
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I think given the shift in the meta to a more aggressive style of game with a shorter set-up before hitting the mid-game, I am coming back around to taking these creatures in certain builds once more