Changes

He has higher than average health, high mana gains with an unbalanced spread, and average deck limits leaning towards creatures and spells. He has quite good mana gains in Blue, descending a point at a time through White and Black.

All of Mordenkainen's abilities involve {{Ability|Roll a D20|Rolling a D20}} for a variety of possible outcomes. He can create a buff-destroying creature {{Ability|Token}} creature which is stronger with more different cards in hand. He can {{Ability|Copy}} spells and give them mana, and also draw cards and give them mana, including his ultimate . His ultimate, which draws a full hand of different cards with half mana, is very good for pulling off combos. He has a Passive Ability, [[#Mordenkainen's Lucubration|Mordenkainen's Lucubration]], which enables him to Discard-Draw every time he casts a Blue card.

| Effect 1 = Draw up to 1 cardscard. Pick one of the first 3 cards in your hand. Then: {{Ability|Roll a D20}}: 1 - 10: {{Ability|Exile}} that card. 11 - 20: It gains 6 mana.

| Effect 2 = Draw up to <b>2 </b> cards. Pick one of the first 3 cards in your hand. Then: {{Ability|Roll a D20}}: 1 - 10: {{Ability|Exile}} that card. 11 - 20: It gains 6 mana.

| Effect 3 = Draw up to 2 cards. Pick one of the first 3 cards in your hand. Then: {{Ability|Roll a D20}}: 1 - 10: {{Ability|Exile}} that card. 11 - 20: It gains <b>half </b> of its mana.

| Effect 4 = Draw up to 2 cards. Pick one of the first <b>4 </b> cards in your hand. Then: {{Ability|Roll a D20}}: 1 - 10: {{Ability|Exile}} that card. 11 - <b>19</b>: It gains half of its mana. <b>20: It gains full mana.</b>

| Effect 1 = Create a Faithful Hound creature {{Ability|Token}} [Blue Dog Illusion Creature 1/1 with "When this creature attacks: Remove all Buffs from the first opposing Buffed creature. When this creature enters the battlefield: It gets +2/+2 for each card with a different name in your hand."].

| Effect 2 = Create a Faithful Hound creature {{Ability|Token}} [Blue Dog Illusion Creature 1/1 with "When this creature attacks: Remove all Buffs from the first opposing Buffed creature. When this creature enters the battlefield: It gets +2/+2 for each card with a different name in your hand."]. <b>Then: {{Ability|Roll a D20}}. 1 - 10: Your Illusion creatures gain {{Ability|Flying}} until end of turn. 11 - 20: Your Illusion creatures gain {{Ability|Flying}}.</b>

| Effect 3 = Create a Faithful Hound creature {{Ability|Token}} [Blue Dog Illusion Creature 1/1 with "When this creature attacks: Remove all Buffs from the first opposing Buffed creature. When this creature enters the battlefield: It gets +2/+2 for each card with a different name in your hand."]. Then: {{Ability|Roll a D20}}. 1 - 10: <b>Your Illusion creatures gain {{Ability|Flying}}</b>. 11 - 20: Your Illusion creatures gain {{Ability|Flying}} <b>and {{Ability|Unblockable}}</b>.

| Effect 4 = Create a Faithful Hound creature {{Ability|Token}} [Blue Dog Illusion Creature 1/1 with "When this creature attacks: Remove all Buffs from the first opposing Buffed creature. When this creature enters the battlefield: It gets +2/+2 for each card with a different name in your hand."]. Then: {{Ability|Roll a D20}}. 1 - 10: Your Illusion creatures gain {{Ability|Flying}}. 11 - <b>18</b>: Your Illusion creatures gain {{Ability|Flying}} and {{Ability|Unblockable}}. <b>19-20: Your illusion creatures gain {{Ability|Flying}}, {{Ability|Unblockable}}, and {{Ability|Hexproof}}.</b>

| Effect 2 = Create a Mordenkainen's Penultimate Cogitation {{Ability|Token}} [5 shield with {{Ability|Resilient}} and "When you cast a non-copy spell card for the first time each turn: {{Ability|Roll a D20}}. 1 - 10: {{Ability|Copy}} that card. It gains half of its mana. 11 - 18: {{Ability|Copy}} that card. It gains full mana. 19-20: {{Ability|Copy}} that card. Then, each spell card in your hand gains full mana."]. Then: {{Ability|Exile}} your hand and draw the first <b>4 </b> different cards from your library.

| Effect 3 = Create a Mordenkainen's Penultimate Cogitation {{Ability|Token}} [5 shield with {{Ability|Resilient}} and "When you cast a non-copy spell card for the first time each turn: {{Ability|Roll a D20}}. 1 - 10: {{Ability|Copy}} that card. It gains half of its mana. 11 - 18: {{Ability|Copy}} that card. It gains full mana. 19-20: {{Ability|Copy}} that card. Then, each spell card in your hand gains full mana."]. Then: {{Ability|Exile}} your hand and draw the first <b>5 </b> different cards from your library.

| Effect 4 = Create a Mordenkainen's Penultimate Cogitation {{Ability|Token}} [5 shield with {{Ability|Resilient}} and "When you cast a non-copy spell card for the first time each turn: {{Ability|Roll a D20}}. 1 - 10: {{Ability|Copy}} that card. It gains half of its mana. 11 - 18: {{Ability|Copy}} that card. It gains full mana. 19-20: {{Ability|Copy}} that card. Then, each spell card in your hand gains full mana."]. Then: {{Ability|Exile}} your hand and draw the first <b>6 </b> different cards from your library. <b>Those cards gain half of their mana.</b>