If you're looking to enhance your army, Glacial Plating, Ascendant Spirit, Narfi, Betrayer King, and Rimefeather Owl all provided increasingly powerful damage outputs as the game goes on
Card Name Mana Cost Type Creature Gargoyle Rarity Rare rules Text Defender, flying: Creatures you control with defender can attack this turn as though they didn't have defender
This and other fast lands are great picks for building a solid mana base since the early turns are usually the most important turns of a game
My gut tells me Cecil is good but not broken
The first ability allows you to create a 1/1 Elf Druid creature Token, the second allows you to destroy any targeted artifact or enchantment to control the board and the final provides you with a ridiculous draw engine which draws you a card for each green creature you control
#6 Captivating Vampire- $7 Captivating Vampire is a strong Commander card