Whenever Gonti's Aether Heart or another artifact enters the battlefield under your control, you get {E}{E} (two energy counters).
Pay eight {E}, Exile Gonti's Aether Heart: Take an extra turn after this one.
{3}{U}{R}
Kraum, Ludevic's Opus
Legendary Creature - Zombie Horror
Flying, haste
Whenever an opponent casts their second spell each turn, draw a card.
Partner (You can have two commanders if both have partner.)
4 /
4
{2}{G}{U}
Kydele, Chosen of Kruphix
Legendary Creature - Human Wizard
{T}: Add {C} for each card you've drawn this turn.
Partner (You can have two commanders if both have partner.)
2 /
3
{4}
Panharmonicon
Artifact
If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
{1}{U}
Thrummingbird
Creature - Phyrexian Bird Horror
Flying
Whenever Thrummingbird deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)