Bolas's Citadel [War of the Spark Promos] Judge Gift Cards 2003 you may cast that card

you may cast that card without paying its mana cost

This one just gets you

Set: Limited Edition Alpha Type: Enchantment — Aura Common Cost: {G} Enchant land Whenever enchanted land is tapped for mana

Set: Oath of the Gatewatch Promos Type: Legendary Creature — Eldrazi Mythic Cost: {8}{C}{C} When you cast this spell

Bolas's Citadel [War of the Spark Promos] Judge Gift Cards 2003 you may cast that cardSet: War of the Spark Promos Type: Legendary Artifact Rare Cost: {3}{B}{B}{B} You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its converted mana cost rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.