{1}: Mistform Stalker becomes the creature type of your choice until end of turn. {2}{U}{U}: Mistform Stalker gets +2/+2 and gains flying until end of turn.
Flying {1}: Mistform Wakecaster becomes the creature type of your choice until end of turn. {2}{U}{U}, {T}: Choose a creature type. Each creature you control becomes that type until end of turn.
Creature spells you cast that share a creature type with Mistform Warchief cost {1} less to cast. {T}: Mistform Warchief becomes the creature type of your choice until end of turn.
{3}: Mizzium Transreliquat becomes a copy of target artifact until end of turn. {1}{U}{R}: Mizzium Transreliquat becomes a copy of target artifact, except it has this ability.
"What is it? Um . . . what do you want it to be?" —Juzba, Izzet tinker
Enchant creature Enchanted creature has trample. Whenever all non-Wall creatures you control attack, enchanted creature gets +X/+0 until end of turn, where X is the number of attacking creatures.
"Why is loud stupidity so infectious?" —Rana, Suq'Ata market fool
Mogg Toady can't attack unless you control more creatures than defending player. Mogg Toady can't block unless you control more creatures than attacking player.